I'm getting low velocities for a given amount of powder (according to load manuals); here are a few loads I've tried. IMR7828 65g 2884fps, H4831SC 64g 2811FPS, Reloader25 66g 2786FPS, Reloader17 61g 2980fps all using Federal Mag. Match primers. This is a new rifle I'm breaking in, it’s a Defiance Mutant long action with a 27 inch Brux 1:9 twists throated for the Berger 180 grain vld. Case OAL is 3.15" using Berger's 180 grain hybrid vld bullets. I've tried 4 different powders and they are all giving the same results. As I get close to maximum load the velocity is lower than what I would expect but I'm not showing any pressure signs at all. Primers look good and no resistance at all when you lift the bolt and I've verified the chronograph against two others. I think the long throat is giving me more capacity compared to one that has half the bullet inside the case and it's just going to take more powder to get the same results. One thing that's odd is you would think the slowest powder (RE25) would produce higher velocities than the faster powders in this circumstance. Has anybody seen this before?