Now I'm going to have to get some Retumbo.Sorry I'm late to this string... I've been working a load for my Sendero over the last few months. Started with H1000 and didn't ever satisfactory results. Switched to Retumbo and worked my way up from 69gr in 1/2gr increments. At 72gr the magic happened, 0.33" 4 shot group at 100 yards, 0.010" of the lands, no pressure signs, 26 inch barrel. If you look around on the web, several others have had the same result. gun)
Good info…and this is just for reference…my 270 Wby (same case capacity as the 7mmRM)…I recommend 7828 SSC or 7977. It's much easier to find, and works great with the 168 VLD's in the 7mmRM.