Kind of a multi part question. I have a custom 7 rem mag based on a weatherby action. It has a McMillan sporter stock and a hart #5 barrel. It was designed to be a longrange hunter. It also sports a vx3 long range 30 mm scope. Everything is cool as far as bedding and barrel floating as far as I can tell. My problem is that I can't seem to get it to shoot as accurately as I'd like. My gunsmith originally worked up a load using nosler brass, 160 gr accubonds, reloader 22 and 210m primers. It shoots that recipe pretty well but I seemed to notice velocity spreads which I kind of equate to the reloader 22 and the 210m primers. I have also tried to get itto shoot the new 168 berger classic hunter over a number of powders using primarily 215m primers. I should have also mentioned the twist rate is 1:9 as far as I remember. The bergers just haven't seemed to wanna shoot. My question is, even though I'm not seeing anything that might lead me to believe that the bullets are not stabilizing, is there a possibility that those bullets are not stabilizing properly afterall? The brass has been loaded somewhere around 5 times. I'm not seeing any reason to think the brass has gone south and I'm pretty anal about brass prep. Have you guys seen brass that has been loaded a handful of times affect accuracy even though it has been prepped well? Sorry for the rookie questions but I'm about at my wits end, considering the time and effort that has been put into this gun. Any ideas or bullet suggestions would be appreciated. I have even considered trying lighter bullets and giving up the ballistic coefficient but that would seem to be contradictory to the long range purpose.