.25 stealth back up and running
So, after a whole new valve, breech, cocking arrangement, scope rail, barrel bushings and shortening the barrel to 20″ My gun is basically finished for a bit.
Here she is
I can tell you one thing, this valve is making some serious power, I’m getting valve lock until about 110 BAR, but at only 100 BAR or 1450psi i’m shooting JSB Kings 25.4 grains over 1020 fps. I have all ready zeroed in my scope so don’t fancy taking the barrel out to add more spring tension but if I could fully open the valve on a full 3000psi fill (or 3625psi which is what it is rated for) then I think I would be shooting into the 130-150 FPE without having stupidly heavy pellets.
I do get a twang from the hammer spring so I will have the barrel out soon enough and will add more tension to get it to open more. Looks like I will be getting myself some of Jerry’s slugs 🙂
Dave
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This a whole new valve I machined myself, take a look here for some photos
http://www.talonairgun.com/forum/viewtopic.php?t=16948
But I did manage to get the standard gunpower valve up to around 40FPE in .22, just a good polish, open up the stem ports and make the hole in the psring retainer bigger (But make sure it still holds the valve spring and that should put you somewhere near 40 fpe with a 18″ barrel.
Dave
Gee someone send him a test hammer and spring, I would like to see what this mega mod can do, anybody.
Any hints on what you did to the valve? I’m gonna do some major mods to my valve..but don’t want to reinvent the wheel 🙂
Chris, I have had the thought, but haven’t really settled on a design…. I just like trying new things haha
RJ, The valve return spring is pretty soft, it is more the fact that the valve opening is pretty big, and I only have about a 60g hammer, I need something more in the 90g range
Chris, Ive got that other threaded collar for you mate, just need to post it.
Dave
Dave any more thoughts about selling your valves,many thanks if you get back in touch.Chris
Looking good dude. You need an AR15 grip adapter for that thang!
hay Dave have u thought about the valve spring maby its too heavy??? just a thought
Viewing 8 replies - 1 through 8 (of 8 total)
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I just bought a stiff spring, it is suppose to come soon, you want to borrow it for testing, I can send it to you when I get it, then you can make another hammer if you want???