So I've shot factory loads, and worked up loads based on both Hornady and Hodgdon load data for 6.5 PRC using H1000 and H4831SC, and keep coming up WAY slow compared to the published data, to the tune of hundreds of feet per second. I thought this was just the rifle (a Ruger Hawkeye Long Range), so I bought a Seekins Havak in 6.5 PRC...same issue. But I recently read where some of you are getting published speeds, and several were using a Seekins. I'm having to go 2-3 full grains above published max to get even close to 3000 fps (not even Hornady max) out of a 147 ELD-M, which makes me WAY nervous. I'm not showing any pressure signs out of the Seekins except for just a little primer cratering, but the Ruger is showing sticky bolt and a fair amount of cratering. I've been reloading for multiple other calibers for a number of years, and have never seen differences between published and actual this bad. Is anyone else seeing this disappointing of results?