I would like some thoughts of The Forum on this. I'm getting ready to do a new 30 caliber Magnum rifle build. I was looking at a 30 Nosler , 30- 28 Nosler Wildcat , the 300 PRC and the 300 PRC Sherman improved . Because I thought none of them could reach the 3150 feet per second I was looking for out of 212 - 215 grain bullets, I jumped up to the 300 Remington Ultra Mag an ordered a long throated Reimer from PTG. Looking closer at the 300 PRC Sherman improved load data shows velocities of 3190 and 3200 + fps that seems to beat the 30 - 28 Nosler and rival the 300 Remington Ultra Mag. What are your guys's thoughts . Please help me understand if I'm wrong on this. I'd like a healthy discussion on this as once I build a rifle, I'll be stuck with that cartridge until I sell it or wear out the barrel. The build is on a Remington 700 action with a 28 in proof research carbon fiber Barrel I believe the twist rate is 1 + 9 or could be one an 8.5 I'll have to look.