Traded this bad boy for my 454 Alaskan a while back. First time out at the range. Freedom Munitions "big grains" 350GR at 1600fps according to the website. From what I can tell that's more or less "training ammo". Underwood has something at 350GR that is 1900+. I was pleasantly surprised. This is downright fun to shoot, much better than that nasty little snub nose 454. Only ran thru 4 wheels worth, but could have shot that all day if it wasn't a buck a round. I might change my tune with hot ammo, but I get the felling it will still be better to shoot than the 454.