QB78 .177 MV- okay @ 600fps?January 27 2017 at 2:17 PM
cobalt (Login cobalt327)
New .177 QB78 bought 12-2016. Totally stock. Tested using a chronograph. First CO2 cartridge, getting ~600 fps w/Crosman Premier HP 7.9 gr, want to know if this is reasonable or abnormally low- I've seen reports of QB78 velocities being higher but little/no info on what, if anything, has been done to these guns to get the higher MV. All that I have done is clean the barrel prior to shooting it the first time.
Thanks in advance, Mark