Thanks guys, Doug the 350 is shooting CPHPs at just under 800fps the last time I chronographed it. I suspect that is a little low due to a low breach seal issue. Several posts ago I think it was Harry that gave me some ideas on how to fix the breach seal issue. The gun has been lube tuned only. I’ve had it apart and checked over all the parts, the piston seal was in good shape, and the spring was straight. I squared and polished the spring ends and polished hardened washers, lubed everything up and but it back together. As a few folks on this forum told me it would be, it was dry as a bone coming from the factory. As far as hold sensitivity goes this gun seems to not care where or how it’s held. It truly is one of the most accurate spring guns I’ve ever owned.
Back to the breach seal for just a minute, a buddy of mine just recently purchased a 350 Feuerkraft Pro Compact just like mine. He stopped by last night to pick up my chronograph to do some testing. I just got of the phone with him and he said that using Napier Power Hunters he was only getting about 720 fps out of his. He noticed that his breach seal was flush or possibly even a little negative. He removed the breach seal and shim; he added a little tape to his shim and put all parts back together. After making these minor adjustments he told me he is now getting 850 plus fps. I probably should take some time to do a little work on mine, but is seems to be getting the job done now.