You can expect about 300 fps more velocity over the pistol loads. For example, in the gun I had, the Hornady 300 grain factory xtp mag load would garner 2000 fps.
Handloads I could duplicate this with a max load of H!10. The only problem with my gun was that it would break cases into two pieces with hot loads like that. Most people I spoke to did not have that problem with factory loads in their similar guns. Winchester and some factory loads are anemic. I sent my gun back to Braz Tec and they said they put a new barrel on it, however, the new barrel did the same thing. These are great guns if you get a good one. Mine would shoot 45 LC fine with hot loads 300 grain bullets at 1600 no problem, it would really put the smack on whitetails. I sold it to a fellow who just wanted to shoot 45 lc in it. .
