I had a chance to go out and shoot some 154 gr Hornady Spire Points with both IMR 7977 and 4451. Worked up to 71 gr with the 7977 and 60.7 gr with the 4451, those are Hodgdon's max loads with both powders and the 150 gr Partition. Didn't chronograph today but I would expect both to be +/- 3040 fps like the data. The 4451 was just over 1 " and the 7977 was just under 1" so it looks like there is something to work with there. Going to try the 150 gr Partition's next.......
