![]() RL22 is a bit slower and with it I have had good results. A slower powder would be H4831sc and I've never had much luck with that powder in anything including a 7mm mag ans a 338 mag. ![]() 4350 is a tube powder and sometimes, well usually, you can always settle it and gain a bit more room. It will settle the powder and could give you a bit more room. If you try IMR4350, I would, throw the charge and then befor seating a bullet, tap the body if the case a bit. That should get you just below the junction of the neck and the shoulder. My manual list's the most accurate load as Viht N550 at 87% density. If you start getting into powders to much over 95% your probably getting into to slow a powder and might be reaching the point where you will compress the powder seating the bullet. The Nosler manual I have does show load density and IMR 4350 fill the case to 92% with a max load. 4350 will probably be one of those powder's. The best powder is normally a powder that fills the case close to 100%. Click to expand.I'm not familiar with any of the short mags but, I suspect that it holds quite a bit of powder.
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