I’ve been running some trials with the Lehigh 194gr ME. Rainier 16” ultramatch barrel, 1:7.5 twist. Best results from Vihtavuori N120. This is a 10 shot group @ 50yds. 2.20” COAL, CCI 41 primer, 10.6gr VV N120. As a side note 300blktalk.com is a good forum for more granular 300blk info.