No worries. I tried a few powders. 4350 gets you there but I settled on 73 grains of Ramshot BigGame. As mentioned 2950 fps and excellent accuracy.
The rifle? I posted it a couple of weeks back on the 358 Norma thread.
Bill Leeper put this together for me a few years ago. It's a 358 Norma Long Neck which uses untrimmed 300win brass; it is essentially a 358 Norma with a 35 Whelen neck. A M70 classic stainless magnum length action with Wisner extractor. Pac-Nor 22 1/2" 1-12 twist barrel. D'Arcy Echols Legend standard fill stock made by McMillan, one of only two "swirly" Legends in existence. Leupold QR low rings hold a VX-III 1.76-6X32 scope with Premier Reticles #4 reticle. All up it weighs 8 1/4 pounds and balance on the rear edge of the front guard screw, and puts 225TSX's at 2950 fps way under an inch. It's the best all-around hunting rifle I have ever owned, ever seen for that matter.
I like it enough that Bill is putting together it's mate, a 270 on an early M70 action in an Echols edge stock. It will balance the same as the Norma but weigh about 3/4 pound less. I can't imagine a better pair of hunting rifles.