tried it... mehh.. the .408 is more accurate... less recoil but still packs the firepower to tear a hole thru ur head the size of a tennis ball


.
altho... my uncle used to own this gun
12.7 x 99 Browining .50BMG or the
12.7 x 107 DSHK .50cal bullet
14.5kg
888 m /s muzzle velocity
1.6km max range...

i let off 20 shots with this beast before my uncle had to return it... (fauly safety mechanism and the spring in the mag was a little weak.. plus my vacation time was over

)