No expert here by any stretch, but I have 3 trapdoors, and all 3 of them get slightly over 2 moa with the Lee 405 plain base. One rifle, an absolutely pristine bore cadet likes the Lee 405 hollow base. AS dropped, not sized, using Lee Liquid Alox. I tried to duplicate the original black powder velocities with smokeless to kinda sorta match the Buffington sights on all 3. The best rifle, the cadet, with zero wind, dead rest...I can get about 50% hits on a 20 inch steel target at 500 yds....but it took a lot of work to get there. It's kind of a hoot, the time of flight is so long...I can lean over and look in the spotting scope before the bullet arrives. Everybody else swears by the 500 gr bullets, but I just struggled and finally gave up. And I'm not fond of any extra recoil.
