Posted 13 May 2012 - 05:41 PM
I have been building my daughter's 1322 and it has only the steel breech and 14 1/2" barrel. With (10) pumps is shoots a pretty consistant 473FPS. As soon as the Long Probe Bolt, FT Piston and FT Valve arrive from Mellon Air I'll install them and shoot it over the Chrony again and post the results for you with various pump quantities so you'll have a pretty good idea of approximately where your's is shooting. I'd say with all the mods you've done to it with (10) pumps it is most likely hitting around 500 to 510 FPS, maybe a little bit more. Like I said, I'll let you know what the numbers are once I get mine more closely modded to yours.