Below are two loads I loaded for my .300 RSAUM; I made a post a few days back about the bolt not closing on the gun, fixed that problem and here are the results of the two loads:





The top group was with IMR-4350, bottom with Reloader 22. As you can see they both are very similar. The two options im throwing around are to 1-just go with the RX22 load since its a tad bit smaller, or 2-load up 3 more of each and shoot them at 100yrds and see what kind of group I get. But I can only guess that since RX22 was a bit tighter at 50yrds, that it will be tighter at 100yrds. thanks.