BSA R-10

What are the benefits to having an X-Tune?

It is a good way to make sure you are getting the most out of your rifle.

The tune up generally improves the consistency and operation of the rifle and therefore the accuracy.

The rifle feels more refined, smoother and in most cases the action noise is reduced.

The rifle is checked over, serviced, tuned for optimum performance and the power is set to around 11.5ftlbs for sub 12ftlbs rifles.


What is involved in an X-Tune?

  • the action and regulator are stripped, cleaned and examined,
  • any loose or ill fitting parts are tightened and/or refinished correctly,
  • burrs, crud, tool marks etc are removed or repaired,
  • any worn or damaged O rings are replaced and properly lubricated,
  • the firing valve is adjusted to reduce the difference in power between light and heavy pellets,
  • the standard metal spring guide is replaced with a lightened spring guide in sub 12ftlbs rifles,
  • a low friction "slip disk" is fitted to the hammer assembly,
  • the trigger sears are polished and lubricated to make it smoother,
  • a hammer spring is selected to suit your rifle,
  • the ends of the hammer spring and firing valve spring are de-burred and polished,
  • the transfer port is modified to improve air flow,
  • the pellet inlet (magazine bridging part) is modified to make it easier to load magazines,
  • the bolt is modified on the Mark 1 so that you do not need to pull it back the extra bit when changing the magazine, it makes changing magazines much easier,
  • check the barrel is aligned correctly and make sure the barrel is secure,
  • modify the port in the barrel to improve airflow,
  • check the barrel crown and repair/re-crown if necessary,
  • make sure the gun is in good working order,
  • adjust the trigger and reduce the side play,
  • set the power to make sure it is running below 12flbs, unless it is an FAC model,
  • if you use the new style magazines I can remove the indexing to improve consistency,
  • the regulator is serviced, the regulator pressure is set and tested *
  • supply a work sheet with a list of the work carried out and supply an XTX Air sticker,
  • this list is not exhaustive and is subject to change as new ideas and modifications evolve...
  •  * Please note this only applies to HuMa and Tench regulators, whether fitted by XTX Air, DIY or another tuner.
    I no longer work on standard R-10 regulators, they take too long to "fix" and are prone to failure. 
    HuMa Regulator
    This is a new replacement regulator for the BSA R-10, it is offered as a DIY fit regulator and it can be fitted as part of an X-Tune. I believe is a great way to improve the consistency and reliability of the R-10. I highly recommend the HuMa regulator if you are planning on shortening your barrel, it is more stable than the standard R-10 regulator at higher regulator pressures (which are needed when the barrel is shortened). You unscrew your old regulator from the regulator block and the new HuMa regulator screws in it's place. There are fitting instructions to accompany the DIY regulator. For convenience the regulator comes pre-set for your calibre and barrel length but it is also possible to adjust the regulator pressure to fine tune your rifle. They come in different pressure ranges to suit low, medium and high powered (FAC) rifles. 
    I can also fit the HuMa regulator as part of the X-Tune and service. 
    Fitting a HuMa regulator includes the X-Tune detailed above or you can buy the DIY version to fit yourself.
    The latest batch of HuMa R-10 regulators have been re-designed to allow them to be fitted to standard regulator blocks and previously blueprinted rifles. If you happen to buy a second hand HuMa R-10 regulator and you have a blueprinted rifle, you will need to make sure it is the correct version of HuMa R-10 regulator or else it will not work unless you replace the regulator block.


    FAQ: HuMa vs Tench (discontinued) the HuMa regulator is designed specifically for the R-10, it does not involve any machining of the regulator block and the rifle can be put back to standard if need be. The Tench regulator was designed to fit the BSA Ultra/Scorpion. To make the Tench regulator fit the R-10, the regulator block has to be machined and re-ported (which is why they cost more to be fitted than the HuMa and they are not a DIY fit regulator). Both regulators regulate very well and are miles better than the standard R-10 regulator.
    Basic Strip, rebuild and service

    This is for people who want their rifle repaired or parts replaced/modified (replacement parts are not included in the price of the service),
    Barrel swaps, shortening, threading etc
    Power adjustments.
    This does not include all the items listed in the X-Tune, it is a standard/basic service.


    How many shots can I expect from my R-10 after the tune up?

    How long is a piece of string?...

    The .177 15” barrel should give 160+ regulated shots.

    The .22 15” barrel should give 180+ regulated shots.

    The shorter the barrel the more shots you will loose because shorter barrels are less air efficient than longer barrels. Shorter barrels force the action to work harder because it requires more air to get the pellets up to speed before leaving the barrel. It also makes the action louder.

    Please note these figures are averages and some rifles may be higher or lower, it also depends on the pressure the buddy bottle has been filled to, the power of the rifle, the type of pellet being used etc.

    What pressure should I fill my airgun to after the tune-up or service?

    Fill to the manufacturers recommendation of 232bar or less. A lot of standard R-10s do not like being filled to over 200bar so I would suggest you check your rifle over a chronograph when you fill to over 200bar to make sure you are getting full power shots. You can fill to 232bar when you have a Tench/HuMa regulator fitted.


    How long does it take to be tuned or serviced?

    The actual work takes around 6-8 hours to complete if there are no other problems with the rifle. I normally only book in one rifle a week and the work is carried out over the course of the week. Have a look at the calendar page to see my availability. Bookings can be made via the eShop. 


    How do I send the rifle to you and what do I send?

    I only need the action when fitting the regulator or doing an X-Tune, please do not send the scope, stock, buddy bottle or silencer, it may add to the return postage cost. 

    Please make sure the trigger is well protected when packing because it is a weak spot or remove the trigger blade and hang onto it.

    The action should be wrapped in bubble wrap and put in a sturdy cardboard box or tube. For some carriers the box will need to be under 610mm long.

    Please note you are not allowed to post pressure vessels with most couriers, Royal Mail and Parcel Force have started destroying any bottles/cylinders they find in parcels. It is best to remove the buddy bottle from your rifle before sending it to me, I will use my own buddy bottle for testing and setting up your rifle. 

    YouTube clip showing how to pack your action for posting

    You can use:

    • Royal Mail Special Delivery, which is insured and next day delivery, which is £12.50 if it is under 2 kg and £28 between 2 and 10 kg. Royal Mail Price Finder
    • Parcelforce Express 48 - they only offer a max of £100 compensation for airguns.
    • You can use other couriers but please be aware that some will not knowingly carry airguns and will not offer any compensation for air rifles if something goes wrong.
    • Delivery in person.

    R-10s usually weigh under 2kgs if you do not go too mad with the packaging, you may also need to remove the shroud to keep the box under 610mm for Special Delivery. If you are concerned about your rifle getting damaged in the post it is best to package it properly and pay for the extra weight.


    Can I drop off and collect my gun rather than posting it?

    Yes this is an option, if you want to drop it off and collect it at a later date then please give me advanced warning, so I can make sure I am available.


    Can I send you my regulator without the action?

    If you feel confident that you can remove/refit the regulator block and adjust the power to keep it below 12 ftlbs with any commercially available pellet after the regulator is refitted, then yes. 


    Will it affect my BSA warranty?

    If you have any BSA warranty on your rifle it will be void after any tuning work or modifications are carried out.

    The BSA warranty is not transferable when the rifle is second hand, even if bought from a RFD, so if you are not the original owner you will not be covered by the BSA warranty.

    Generally very little goes wrong with PCPs, the usual faults are leaks and I will repair these for free for the person who originally had the work carried out by me as long as the rifle has not been tampered with.

    If the fault is not related to the tuning process, I will inform you and quote to repair the problem before carrying out the work.

    Please note the warranty is a return to base (RTB) warranty, which does not include postage costs.


    When is the best time to get a tune?

    If the gun is brand new then it is probably best to run a tin of pellets through it before sending it in for a tune. This will give you a chance to spot any issues/faults with the gun, which can be dealt with by BSA under warranty.


    Can you change, thread or shorten my barrel?

    Yes but I will no longer shorten R-10 barrels to less than: 12" (305mm) in any calibre unless it is going to be set at below 6ftlbs. Guidance on Firearms Licensing Law

    Roughly 3" of the barrel is held within the breech and most R-10s have 15" barrels as standard. The very early mark 1 models had 12" barrels and the newer Super Carbine models have 12" barrels.

    Shortening the barrel will reduce your shot count because shorter barrels are less air efficient.

    To work on the barrel involves stripping the rifle and removing the anti-tamper devices, which will invalidate the BSA warranty. If the barrel is shortened/lengthened then the regulator pressure and power will need to be altered at the same time.

    I highly recommend the HuMa or Tench regulator if you are planning on shortening your barrel, they are more stable than the standard R-10 regulator at higher regulator pressures (which are needed when the barrel is shortened).

    • It is free to swap a barrel of any length, if done at the same time as a tune/service.
    • £40 to shorten a barrel when done at the same time as a tune.
    • £35 to screw cut a barrel if done at the same time as a tune.
    • £77 to supply a new BSA barrel (the 12" Ultra barrel is a popular option for people who want a shorter barrel that is already threaded for a silencer).

    If you have a threaded barrel it would be cheaper to have it shortened than it would be to replace it but if it is not threaded then it would be cheaper to swap it and then sell your old barrel to recover some of your expense.


    Can you shorten my shroud?

    Yes, shortening the shroud is a cost effective way of shortening the R-10, without having to go to the expense and trouble of shortening the barrel and getting the regulator and power adjusted. There are 2 options when it comes to shortening the shroud:

     Shortening from the breech end of the shroud - Early Mark 1 R-10's can be shortened quite a bit because they were fitted with 12" threaded barrels, the later Mark 1 & 2 R-10s can be shortened by around 83mm because they are fitted with 15" barrels. The shroud is shortened and then internally machined and threaded to replicate the original shroud. The springs and plastic baffles are not used after shortening the shroud as there is no space for them inside the shroud.

     You will need to post me your shroud and let me know which barrel you have fitted.

     Shortening from the muzzle end - This is best if you have a threaded barrel on your R-10 or you plan on using a silencer adaptor fitted to your barrel.

     I will need an accurate length for this to be done, so you will either have to measure the length of the shroud yourself and I will cut it to the length you give me or I will need your action to make my own measurements.

    YouTube video showing the shroud fitting and options click me

    Web page covering the shroud options click me

    Will my old silencer/moderator fit my rifle after the shroud has been cut down?

    Silencers/moderators that have a tapered end on them, like the HW, Twink and BSA VC will not finish flush with the shroud (on the shrouded models). Silencers with a more square back on them like the BSA R-10 VC and SAK will fit nicely, without any steps or gaps where the silencer meets the shroud.

    I can machine off some of the taper on some silencers, to make them fit but it depends on the model, please have a look in the eShop for more details.


    What power do you set the gun to after tuning the airgun?

    I set the gun to around 11.5flbs using a heavy pellet in .177 and a similar power using a mid weight pellet in the .22.

    I will not set your airgun to over 12ftlbs unless you have a valid FAC and the gun in question is on your certificate, so please do not ask.

    If you want an airgun that shoots over 12ftlbs then apply for a FAC.

    Do you only tune R-10s?

    No, I can swap or thread barrels, add custom parts, carry out repairs and service your rifle.

    I can also make modifications to the stock, such as adjustable cheek pieces and hamsters etc.

    I make and sell custom parts for R-10s, have a look in the eShop.

    If you can think of something that you want done then there is a good chance I can make it happen or I can put you in touch with somebody who can.

    I also fitting Tench/HuMa regulators to Ultras, Hornets and Scorpions and Air Arms rifles.

    Prices vary depending on what you want do, please have a look in the eShop and the service price list page. 

    Do you carry spare parts?

    I don't generally carry a large stock of spare parts other than the parts used for servicing the rifles and modifying the regulators.

    There is a selection of accessories and commonly used O rings available in the eShop.

    If you need spare parts, I can source them from John Knibbs International, who are now dealing with all the spare parts for BSA. You are also welcome to source your own parts for me to fit.

    Please note that if I need spare parts, repairs may take a bit longer, as they need to be ordered and delivered.


    Will my rifle need maintenance after getting tuned?

    Like any mechanical device, a rifle needs regular maintenance. Parts wear and lubrication can dry out etc. The action and stock should be wiped down with a corrosion inhibitor, moving parts should be lubricated and O rings should be lubricated with a suitable product, like Abbey SM50.

    Please don't use 3 in 1 oil or engine oil to lubricate your gun, use proper gun oil.

    It is a good idea to clean your barrel with a pull-through after your rifle returns from having work done, when changing brands of pellets or when you notice your groups opening up. 

    It is advisable to chronograph your rifle regularly, to ensure it stays below the 12flbs legal limit with ANY commercially available pellets. Chronographs can be bought for as little as £40 and are a worthwhile investment if you want to keep yourself and your airgun on the right side of the law. It is also good to keep an eye on the consistency.

    There are videos covering barrel cleaning, rifle maintenance and chronoing in my YouTube channel

    What lubricant/oil do you recommend for the airgun?

    I use Abbey SM50 or Bisley Gun Lubricant on the O rings and seals.

    Any quality gun oil with a corrosion inhibitor like Napier Power Airgun Oil is recommended to wipe down the action, especially after using the airgun outdoors.

    Do not spray oil directly into/onto the action because if oil gets onto the hammer it will effect the consistency and is not covered by the warranty.

    The stock can be maintained using stock oil or conditioner, available from your local RFD.

    Please do not use 3 in 1 oil or engine/motor oil on your action, it does more harm than good.

    What are the best pellets for my airgun?

    Generally BSA barrels tend to like larger sized pellets 4.52-3 in .177 and 5.52 in .22.

    The actual choice of pellet is personal to your barrel/gun combination, there is no one pellet that is perfect for all barrels. The best way to find your barrels favourite pellet is to try a number of different brands of pellets and see which gives you the best grouping, remembering to clean your barrel when swapping pellet types. Sample packs of pellets are available on the internet. I not recommend the use of pointed pellets if you plan on shooting accurately past 20yards.

    When using a chronograph to check your airgun is legal, make sure you use a pellet that gives the highest power/efficiency.

    In a .177 I would try Bisley Magnums, JSB Exact Heavy, JSB Exact 4.53mm, Daystate Sovereign, Air Arms Field.

    In a .22 I would try Air Arms Field, Falcon Accuracy Plus, JSB Exact, JSB Exact Express, Daystate Sovereign...

    It is your responsibility to ensure your airgun is below the legal limit.

    How do I pay?

    •  You can pay by selecting the relevant options from the eShop,
    • You can either send the cash or cheque with the action (make sure it is insured because I will not be held responsible if your rifle and/or cash do not arrive),
    • If you are paying by cheque I will return your rifle once it clears. Please allow for the additional time while the cheque clears, typically 2 weeks,
    • You can also pay by bank transfer, via the eShop,
    • Cash on collection.


    Which airguns do you work on?

    I specialise in BSA PCPs, like the R-10, Scorpion, Hornet and Ultra but I do work on other makes and models of airguns and rifles.

    My airgun has been blueprinted, tuned or regulated by somebody else, can you work on it?

    Yes, this is not a problem.


    Where can I find out more information about my airgun?

    One of the best resources for BSA airgun information is the BSA Owners Group forum.

    You can also find information on the BSA website.

    R-10 exploded parts diagram click me.

    YouTube channel showing loads of useful R-10 maintenance tips & repairs click me.

    If you are sending me your rifle/action, please print out the form below, fill it in and include it in your parcel so that I know who you are and what you would like done to your rifle. Please don't forget to make a booking before sending in your action.

    Worksheet XTX - xls

    Worksheet XTX - pdf

    R-10 Super Carbine