Okay, I know I'm resurrecting a dead thread, however, I shot 100 429421's over 13 grains of HS-6 with Federal 155 primers in 44 mag cases last Sunday, and among other feats, I put three consecutive shots (hands rested on bench while getting sighted in with a new gun) into a 1" wide swinger strap at 50m. HS-6 is GREAT for 44 mag!