each has been 110 but i am pretty sure a 120 will fit single load. now i did put a 162 hornedy super shock.284dia fmj projectile in, dropped it backwards into the muzzleand well it provided over 300fpe , but that was an unregulated version of the gun and only the first 5 shots were that energy level. i have not gotten or figured out where the reg will get full power, and i myself dont like the energy that i experienced from central valley airgunners video of the regulated version 110fpe is a far cry from 210fpe i think it can be closer .