Here's one for the pros... I've got a Ruger m77 300 wm. I've always used this gun as my guiding gun and shot factory barnes out of it.. Or whatever clients left behind.. I've been working up loads with little success to get this gun under 1" group. Not new to reloading and never had this issue before. The longest I can seat bullets and have them feed out of the mag is 3.340. Which is right out of the book. Touching the lands is 3.565. That is .225 off the lands. !!! I had 2 factory loaded barnes left and measured them at 3.307. Should I try the factory OAL or something in between ?? I've tried 2 different powders so far.