It isn't ideal, but it does work. I started with 6.5 grains under a 90 XTP, and worked my way down to 5 grains. I would seat the bullet deeper to take up some of the case capacity for better consistency, but that's as deep as my seating stem will go! Velocities aren't very consistent. Last 5 shot string was 1094-1135 with the average at 1106. I think 4.8 grains will work, but will probably be even less consistent. A 125 boat-tail like the NBT would take up some more capacity and probably work better. With the gas port closed, this load is VERY quiet in my AR, and the last 4 shot group (I forgot to hold over on the first shot) at 100 yards was about 1.5". These bullets are made to expand at this velocity, and this will be my backyard pest control round:
