RE: .357 sabot loads???
IMO your uncle would be better served to stay away from the .45 caliber and get a .50 caliber. If he wants to shoot light weight projectiles have him look at the 200 grain Shockwave or the 200 grain 10mm XTPs. I really do not understand why someone wants to decrease the size of the projectile. The little benefit you will gain in the over all speed would be much more (again IMO) out weighted in the down range energy the large caliber will give. Years back, there was comments that the .45 caliber was harder to tune in. I could not say this is true as I do not own one. Again, only telling what I read. I really do not see the advantage of them. Some States out west do not allow them for elk hunting, and while the bullet selection for the .45 caliber has greatly improved, I still think the .50 caliber has a much better selection.