Brent, hybrid100v is a sneaky powder, it peaks quick with no warning IME. I had a hunting rifle with a 26.5" barrel(would like to kick myself in the *** for selling it) I tried a pressure test with 100v and 140 amaxs from 46-50grns, 50 is hodgdons max for a 142 sierra, had the amaxs .030" off the lands almost .200" longer than there oal for the 142s, 49grn went 2963 with no issues whatsoever, so I popped the 50grn load in and sent it through the chrony, it read 3012, I was tickled pink that I could get 3012fps with 50grns of powder, until I had to pry my bolt open and when I go it open the case was stuck in the chamber and the primer was laying in the follower, I had to drive the 1.25$ useless case out of the chamber with a cleaning rod. Btw 210Ms were used for this test. They say it is supposed to be between 4350 and 4831 but in my experience it is an extremely short cut high energy version of Imr4350, actually just a tid bit faster burn rate wise, kinda like what rl17 was supposed to be, they had the same claims.