I have some of the big Lyman GC 452651 slugs, weighing a hair under 349 grains with lube and gas check. This mould has two crimp grooves. For a Ruger Vaquero, I am loading 19 grains of H110 in WW brass with CCI 350 primer and crimping to the top groove for an OAL of 1.576. I also loaded a few rounds with 19.5 grains H110 crimped in the second groove for an OAL of 1.651. Both Taffin and Linebaugh say 20 grains of H110 is safe with 340-350 grain cast bullets in a Ruger, but neither species OAL. Do these loads sound safe to any of you folks? Marshall?