I was not happy with the 97k fac shot cycle, so dropped in a Vmach tune kit. Results were immediately noticeable in terms of buzz reduction and crisper shot cycle. JSB 8.44 was shooting at 890 fps with 2 metal washers in the comp chamber in front of the new delrin top hat and piston sleeve per the instructions.
Well I wanted to see if further improvement was possible so removed the 2 metal washers, re-assembled and shot but felt no noticeable improvement in shot cycle (seat of the pants, no chrony). So re-assembled with 2 metal washers in place and added the delrin spacer in rear spring glide. Now shooting at 908 fps with jsb 8.44gr with pretty much the same shot cycle as without delrin spacer at 890fps.
Accuracy and precision pretty good in vmach settings I tried. So a big thumbs up for the Vmach kit.
Well I wanted to see if further improvement was possible so removed the 2 metal washers, re-assembled and shot but felt no noticeable improvement in shot cycle (seat of the pants, no chrony). So re-assembled with 2 metal washers in place and added the delrin spacer in rear spring glide. Now shooting at 908 fps with jsb 8.44gr with pretty much the same shot cycle as without delrin spacer at 890fps.
Accuracy and precision pretty good in vmach settings I tried. So a big thumbs up for the Vmach kit.
