S10 Reg - Diy Disassembly?

[gingernut]

These guns are so annoying with so many things to go wrong.

I have an S10 Based Stalker that has irritated me for years!

Once you fix this problem another one will appear.

For your own piece of mind I suggest you move it on to somebody who collects rather than shoots.

[jirushi]

These guns are so annoying with so many things to go wrong.

I have an S10 Based Stalker that has irritated me for years!

Once you fix this problem another one will appear.

For your own piece of mind I suggest you move it on to somebody who collects rather than shoots.

Hi gingernut, I managed to take the reg apart in 30 minutes today. It was a matter of a cool mind and hot metal.
It did get me worked up yesterday, but there's a lesson for me: not to continue when I'm frustrated and things aren't working.
I don't see what you mean tbh. The reg can be done at home, all I used is heat, collets and 2 mole grips.
The rest of the gun can be taken apart and serviced relatively easily.
This is my second S10: my other one hasn't had any issues for years and years. John Bowkett blueprinted it for me, which might be the secret.
If you struggle with your Stalker Ten, then I would highly recommend having John service it.
IMO it is a very well designed, reliable and bomb proof airgun.
Will report on results once the reg is resealed and re assembled. I expect to have a fully working and fresh S10 then. Nath is going to refinish the stock. Total cost with refinished stock and seals will be 250 pounds.

[MattyBoy]

Let us know how it is when you have rebuilt it.

Yes they are complicated but once running right they are very very good.

I hunt a lot with my .177 S10 with a Photon NV on top. It's got a fantastic barrel and is a tack driver with 10.3 gr Baracuda Hunter.

I'm actually waiting to get my action back from RT after a REG service. Should be here mid week

When it arrives back I shall be doing some accuracy testing with Exact Heavy as these are likely to be more efficient pellets as they are a softer compound than the H&N Bara's

Best of luck with the rebuild

Matty

[piggy589]

I bought one in pieces but complete,unfortunately the main tool used appeared to be a pair of false teeth .

What an unholy mess it was.

[jirushi]

I bought one in pieces but complete,unfortunately the main tool used appeared to be a pair of false teeth .

What an unholy mess it was.

That's a pity. Patience is required haha. Probably the person who wanted to take it apart got even more worked up than me, and decided to do a few shortcuts, resulting in damage. I must admit that my regulator has a few marks on it now, from the collets turning. Superficial marks to the blueing. Yesterday I put all my anger and aggression in turning, resulting in slipping collets. Very stupid. Heat was the secret. Should have known. It isn't rocket science. But all respect for JB - it must take a lot of knowledge and skills to design something like the S10 cigar!

No time for re-assembly and sealing today; will report on the results tomorrow.

[jirushi]

Let us know how it is when you have rebuilt it.

Yes they are complicated but once running right they are very very good.

I hunt a lot with my .177 S10 with a Photon NV on top. It's got a fantastic barrel and is a tack driver with 10.3 gr Baracuda Hunter.

I'm actually waiting to get my action back from RT after a REG service. Should be here mid week

When it arrives back I shall be doing some accuracy testing with Exact Heavy as these are likely to be more efficient pellets as they are a softer compound than the H&N Bara's

Best of luck with the rebuild

Matty

Nice! Is Barracuda Hunter better than the 8.4 gr JSB Exacts? I use standard JSB Exacts in almost everything in .177, .20, .22 and .25

[gingernut]

Wait till your bottle starts leaking and/or unscrews itself.
Or the magazine starts playing up.
Or the power goes up or down.
Or it won't cock.

To be fair I bought it secondhand and who knows what was done to before I had the misfortune to fall for its nice LH stock.

[piggy589]

I'm a great believer in the adage,a little knowledge is a dangerous thing.

I took one look at the collection of parts in a bread tray and thought this is way beyond my ability.

[jirushi]

Wait till your bottle starts leaking and/or unscrews itself.
Or the magazine starts playing up.
Or the power goes up or down.
Or it won't cock.

To be fair I bought it secondhand and who knows what was done to before I had the misfortune to fall for its nice LH stock.

Never had any of this with my JB tuned S10.
Magazine problem is easy to solve by taking indexing mechanism out of the action and then using the "new style" self indexing mags. I will use Loctite on the reg threads once I've tested it to satisfaction.
Then nothing should undo itself. Can't imagine a bottle with 230 - 80 bars unscrewing itself, the pressure on the threads is big. You might have had one in great need of repair. Trust me I've had my S10 for a long time and it's my most reliable pcp.

[air-tech]

Wait till your bottle starts leaking ...

Just to put this out there - when done shooting the gun, gradually unscrew the bottle while blank firing the gun.

The bottle will / may leak if left screwed in, the bottle valve seal takes a different set when pushed off the seat (opened) by the regulator. Unscrewing the bottle means the valve seats, seals, and stays sealed.

[gingernut]

Good to know.
Thanks

[MattyBoy]

Nice! Is Barracuda Hunter better than the 8.4 gr JSB Exacts? I use standard JSB Exacts in almost everything in .177, .20, .22 and .25

I was originally using the old design Bis Mags with the lines running down the sides which were around 10.6 gr.

When these ran out I tried the 10.3 gr Barracuda Hunter as my barrel likes a long pellet. I find them very accurate and hard hitting for rabbits out to 45 yards.

At RTs recommendation I have just bought some JSB Exact "Heavies" which are also 10.3 gr. I'll be testing these later in the week.

Cheers
Matty

[jirushi]

All done. It works a treat. 630-626-633-624 were the first shots. Power needs to go down.
The stock will be off to Nath.
As good as new, total costs will be 250 pounds, I'm a happy bunny.
After consulting Northwest Airguns, I didn't use Loctite on the reg threads btw. Not necessary according to him and he's serviced a lot of them.

[Bladerunner too]

Congrats an well done for sticking with it, think i will stick with the HW100

[rancidtom]

All done. It works a treat. 630-626-633-624 were the first shots. Power needs to go down.

Which pellets did you test with?
I used JSB Express 14.13 gr. I'll also test with 15.89 JSB's. But I need to find a way to get the power down asap hehe.
Will do a bit of research on this but it's probably a case of taking out a shim in the reg.

This is why I will not work on a regulator alone unless I have tuned the rest of the gun. Tuning a gun is a process involving getting all the relevant parts to work together and optimising them for consistency, then setting the power and re-checking the consistency. Supplying a serviced regulator to a gun which has been modified or badly set up beforehand by another person will more often than not produce an illegal firearm. I am an RFD and do not wish my RFD status to fall foul of the law by supplying parts that people fit to rifles making them unlicensed FAC guns.
If I have tuned a gun I keep records so that it will be possible to service and reset the regulator for that gun in the future if no other modifications have been done by other people. That is the only way I will consider working on a regulator alone.
There is also nothing to say that even with a consistent and legal muzzle velocity that a gun can actually put a respectable group size in due to various other reasons for example the barrel crown and/or the silencer thread. If I have the whole action I can correct most issues such as badly machined crown or breech. I have seen barrels with internal damage due to corrosion or mistreatment that not even a re-crown will make them shoot well.
There are places on an S10 that need Loctite but not the regulator. BSA have over the years seemingly used Loctite in the wrong places, usually excessively when applied. They have also neglected to use it in the right places. I can only guess that the changes were due to different people working on assembly or possibly customers who may have been told the gun has never been serviced when in fact it has been wrongly assembled by somebody in a previous life? Either forgotten about or information not passed to the current owner.