1377 fps???

[mcc1961]

What is the highest fps you can expect to get out modded 1377?

[1377x]

depend on the gun,mods and how many pumps
it does reach a limit to where the pumping doesnt help
lets say 50 pumps gets you 800fps 60 pumps gets you 820 imo the extra 10 pumps dont help any
when i was shooting beeman kodiaks .22 21.12gr out of my converted 1377 to .22 i reached 662fps(20fpe) at 25 or 30 pumps i'll have to go back and get the recorded numbers anything after 25 or 30 pumps wasnt worth the effort just a few extra fps but still 20fpe maybe 10fps more maxit was maxed out hope this is not confusing.my gun pretty much maxed out at 20fpe with a 14.5" barrel never tried a 24" or any other sized barrel it could go over 20fpe in theory