I have been reading up on the .357 Sig. I think some versions of semi-auto's shooting the .357 Sig will get ballistics in the ranges you guys are talking about here. I wonder if it isn't a better idea to shoot .357 Sig in a barrel/chamber designed for it than shooting +p and +p+ in 9 mm barrels. But any cartridges with energies in this range work best in guns of some size. That is what I am doing.