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i have been loading for 7mm rem mag,308 norma mag for 15 yrs using imr4350,with excellent results,i was wondering about norma magnum rifle powder i have heard people talk about it,does anyone know how it compares
____________________ "Don't fight a battle if you don't gain anything from winning" Field Marshal Erwin Rommel
If you are talking about Norme MRP, burn rate charts put it right between H4831 and Reloader 22. Somewhat slower than IMR4350. Norma 204 is about the closest you can get to IMR4350. It sits between IMR 4350 and Reloader 19. RD
____________________ “And the problem with our leaders is that they are.” Charles Krauthammer March 24, 2014
OK,first off, I have never used Norma's MRP. It was a big favorite of the late Bob Hagel though and he worked up some very way over the loading manuals loads with the stuff. He did register one serious complaint that the burning rate varied considerably from lot to lot. The slower lots gave him some fantastic velocities but the faster lots gave unpleasant surprises.
He's been dead for some time now and maybe Norma has squared that problem away. It was considered a good powder other that the variable burn rate by Hagel and some other writers although it was Hagel that used it most of all.
If you like the powder, make sure you get a decent supply with all having the same lot number. If you don't, it would be wise to do the load work up once more, starting from scratch.