I traded for a model 71 and received some Buffalo Bore ammunition with the rifle. The ammo box said the ammo would produce 2250 fps withe 250 grain bullets which is reasonable. I shot the ammo over a crony and got over 2400 fps which is too high. I then loaded up my own and found my rifle developed maximum listed velocity at 2 grains less than the listed load. So I think my rifle must have a tight chamber and that the BB ammo was fine.
