Anyone using US869. Or Accurate Magpro in your 300RUM
I have some 180 and some 185s and few 210 bergers Want to try as I am just about out of me Retumbo powder and cannot find any more Have about 4 pounds each of the other

I use the Reloader 25 in a 7mm ultra mag, 869 in a 26 Nosler, both work great.

RL-22 was my 300 RUM/180 grain powder. Worked great in my rifle.

I’d think if 22 works decent that Magpro would work okay as well.

I use 33, Retumbo and 570 in mine.

Used Retumbo here too, it was king for what i did with it, and DAMNIT, i found a loaded round with Retumbo and was going to give it to you along with a spare RUM follower for a M-70, give me a holla if you pass through this fall on the way to elk camp, i'll drive up to the interstate and hand em off.

Thanks buddy! I'd just like to stop by to check out your ranch!

Both will work for the RUM, but neither will have the temp stability of Retumbo

Ten fo buddy, little cow farm is always open.

180/185 is a little light for US-869 in 300 RUM. Consequently you can add powder but there's not enough pressure to burn it, and it comes off perceived as dirty. The 210s will work, around 100.0 gr. Still a little on the slow side, but I'm in the same boat as everyone, no Retumbo.