I thought 38 years of reloading was extensive, but I have way more to learn and need some help. I'm loading 10mm with #9, 200gr. XTP's, CCI300 primers, and new Starline brass (plain brass, not nickel plated). Firearm is a G20 with a Jarvis 5.5" barrel. My goal is a 1200fps +/- with the 200gr. XTP. (No matter what I do what the G20 or magazines in terms of springs, I get FTF's with hotter ammo - the slide speed is too fast and rides over the next round in the mag. Issue for another time.) So the reloading issue... With 12.3 grains of #9 I get velocities of 1260fps. With 11.6 grains I get velocities of 1233fps. Two issues with this. First the velocities are higher, for the given amount of powder, than everyone is getting (from the oh-so-trusted internet). Second, I'm getting very little change in velocity, given the significantly reduced (IMO) powder charge. Accurate's load data shows 11.3 grains should give 1030fps with a 200gr. XTP. I'm at 11.6 getting 1233fps?????? I know my taper crimp is tight as feeding issues happen if the cartridge mouth's edge isn't snugged up against the bullet. Press is a Dillon 650. For comparison, Double Tap's 200grain JHP comes out at 1190+/- in the same barrel, so I know the barrel chamber isn't overly tight. I've been shooting this barrel for about 10 years, it's not the barrel. Chrono was checked with a known rounds and it is reading accurately. Powder is checked with a calibrated scale for load development - charges are accurate. Any thoughts??? Thanks.