I usually shoot 300 gr. Hornady or Barnes jacketed ammo , even with my handloads. I recently picked up some Hunter Supply Cast bullets from Midway, 315 gr., .406 dia. for .405 Win. I loaded it up with 50 grains of Reloader 7, a standard load for other 300 grain bullets. The results were terrible. not only did the accuracy suck big time, I coupld hardly hit paper at 50 yds from a bench. Upon inspection I found many of the bullets tumbled. no aerodynamics at all. I know that many times when a bullet tumbles the barrel twist could be wrong for the bullet.
I have never has this problem with any other bullet in this gun and the accuracy has always been great. Whats the problem?
Obviously it's the bullet, but what is the probably cause, and what could be the cure?
Help would be greatly appreciated.
Cheers.
