I have loaded about 1,000 of these. Just bought 5,000 more. For reference I have loaded them for 4 different Sig 320 pistols (2 X5s, a compact and a full size). All 4 of these barrels would take this bullet at 1.150. For comparison, I had to go down to approx. 1.125 for the Acme 124 RN to pass in these barrels. I worked up to 3.5 of Prima V. I had some of the better groups with this bullet compared to others (average group size was about 2 1/2 -3 1/2 inches at 20 yards with those 4 guns, if I remember without looking it up). My go to load currently is 125/125 TC BBI with 3.9 of Prima V at 1.135. Obviously, YMMV...