Re: Over annealing cartridge brass
I did a test to prove to myself what would happen if NECKS were "over annealed"
I heated neck and shoulders of 308 lapua brass to a point of an 8 second long, mid-to bright orange glow. While doing this the case body and heads were protected from the heat to insure we did not create a dangerous situation with softened case bodies. Assisting me was a national level f-class shooter who owns an annealing machine, and declared the brass we just annealed was surely ruined.
I loaded the brass with the same load that I used previously, and fired a 5 shot sub 1/2moa group at 100 yards. yes the neck tension was lighter, by feel of seating bullets, than it had been previous to the "over annealing" but non the less they held the bullets with-out slipping and the accuracy was unchanged.
If you think you annealed the body of your brass throw it away, if you think you over annealed the necks you just might shoot the brass before you pass judgement.