I was interested in checking the Heavy Mag .458 from Hornady as they claim MV of 2260. I don't know the length of the barrel on the rifle they used but my Winchester spits them at at 2210. That's still over 2200 which is what I wanted. I also checked the brass for signs of stress, etc. and found everything OK. The ammo cycled well and proved accurate so I think I'll just go with the Hornady for now although I love the Sledgehammer bullet. I guess my only concern with the Hornady would be the packing of the powder which is in there for sure. When you shake this round you'll hear nothing. Packed that tight could lead to caking, etc. and cause some poor burning characteristics. I don't know as I've never used this ammo in actual field conditions.

Ken Moody