Originally Posted by redthirst
100+ FPS difference?
Lowering the 121 to FS speeds has got to increase the shots per tank pretty significantly, right?
remember, muzzle velocity isnt the whole picture. What we're looking for is muzzle ENERGY. Some measure of brittleness wouldnt hurt either.
Personally, what im more interested in is the 121's flight ballistics (especially compared to the FS round). A lighter round with a faster speed may have its potential if its able to maintain most of it's initial speed during extended flight.