Guys, I'm shooting such a monster. I have a 28" 1.055 straight taper Pac-Nor barrel on a Savage single-shot short action. I just finished chronographing some loads today with RL17. This might scare some of you, but I am up to 3000 FPS with virtually the same pressure signs at 47.5 grains as I am at 42 grains. ES is 18 FPS. I had this barrel made in 2006 IIRC, and just now getting around to shooting it. I also chrono'd RL19, H4350, and H4831SC. Couldn't get the speed out of H4831; ran out of case capacity. The 140 Bergers I'm shooting are just kissing the rifling, and the boattail-body junction of the bullet is about .050" ahead of the shoulder-neck junction of the case. Lots of room for powder there. The barrel has exactly 25 rounds down the tube as of this writing, and with the 47.5 RL17 load, it shoots 5/16" MOA groups at 100y (3 shots only for velocity recording). I haven't fine tuned this load yet, as today was just a chrono day. I'm amazed that the primers look the same all the way up to the current charge. No flattening, nice rounded corners, and no ejector marks on the brass (in fact, there isn't an ejector mark in my bolt head; I didn't install it, as I like picking out the brass by hand). This case just amazes me.