Yes, I know that the bullet is huge, that is the point.
Why not, If I can get that kind of energy out of it, then It will certainly do a hurtin on the shooter and the target.
My other .50 pistol, with the short barrel likes the big bullets more than the light ones.
It would shoot a 458gr bullet not much slower than a round ball for almost twice the energy.
600fpe will penetrate just about anything made of jello. I have an 883gr HP. bullet in .700cal I only got 340 fps out of it and destroyed a 6x6 post, the massive bullet did not even go completely in the post, but the back of the 6x6 had a 2x8inch hole in it. When a huge bullet stops inside and object, the energy transfer is huge, and fun to see your target knocked off it's feet, LOL.
I will also test other bullets, but am keen to get the 650 launched.
Cheerd, David.