Been working on loads for my Rem.700.338LM. I'm using 250grn SMK with Lapua brass and FGMM primers. So far I've tried RL-19...About 1.25in.5 shot groups. H-1000 same...RL-22 hovering around .75 to 1in. I see most everyone has 27 to 29 in barrels on their Lapuas, but mine is only 24in. looking...