by n0tzl on Tue Jan 25, 2011 6:37 pm
Not sure if these will help with the spreadsheet but after 4 months I've ended up with 2 different tunes for my Marauder depending on if I'm after accuracy or just plinking for practice on my 10m indoor range (using that term loosely as its basically through the living room up the front hallway).
Settings from adjustment bottom, full CCW on hammer spring & striker, CW on metering screw, .177 Marauder:
Hammer spring 1.5 turns clockwise, striker 11 turns CW, metering screw 2 turns counterclockwise.
Starting pressure 2300psi
40 rounds per fill
ending pressure 1700psi
This gives me <.25" 10rd groups at 10m using Crosman Premier heavy 10.5gr, 821-841fps.
Hammer spring 0 turns (bottomed CCW), striker 11.5 turns CW, metering screw 1.5 turns CCW
Starting pressure 2100psi, much above shows valve lock
100 rounds per fill
ending pressure 1200psi
This gives me .5" groups at 10m with both CPH 10.5gr & CP Match 7.9gr wadcutters with nearly identical point of impact, very quiet. 689-737fps CPH, 768-815fps CP Match. Great for practicing my gun holds and trigger handling in the house which is what I bought the Marauder for.
73, Dan