I think blems are a deal as long as you are willing to live with the occasional wild shot that you cannot explain.
I believe any process that creates visible and tactile gouges in the jacket also deforms the inner core. Deforming the inner core will shift the center of gravity away, unpredictably, from the axis of rotation. Since I don't have a Juenke bullet machine to test this theory, I can't prove it. I will say pulled bullets don't cluster like my wonderful Nosler & SMK match bullets. And, the further I go out with pulled bullets, the more they show themselves to be, shall we say, not match. But, if you develop a load that holds a pie pan at distance, don't shoot at things beyond that distance, and all will be well.
I have been buying these pulled/seconds and having a great time converting them into future environmental hazards.
Federal Fusion pulled 150 grain bullets in 30 caliber. In this rifle, shot good at 100 yards, but this is only a ten shot group. One of the days going to take it to CMP Talladega and see how the combination does out to 300 yards
These are pulled bullets. Shoot a 15 shot group and end up with flyers, with pulled bullets you are never sure if it was you, the rifle (which is a sub 2 MOA thing) or the bullet.
Three hundred yards is a long way. That bullet out of the group, could be me, could be the rifle, could be the bullet. What should I have faith in?
I don't have 600 yard targets with match bullets in this rifle, but at 600 yards, the rifle and the bullet combination are unacceptable for anything but rock busting. Ok at 300 yards, not Ok beyond that .