how to get to 17FPE in a Prod?October 10 2011 at 3:04 PM
Darryl (Login turbodt)
With a 15.9 grain JSB Jumbo I'm at 14 FPE now (634 FPS). My adjustments are maxed out. I also want to start with a 2600 PSI fill pressure as that seems to be where the grouping tightens up (higher fill pressure seems to cause a slight scatter effect). Is it a combo of a stronger hammer spring and a slightly larger transfer port? I figure just a larger transfer port. Am I in the right direction?