when to anneal

[col48]

Hi all
I have a 243 AI tight neck .270
lapua brass,They have been shot 3 x now and i have started on the 4th.I have started to notice that some off the bullets have less Resistance than others as i seat them.
How often can you shoot them with out annealing them.I am on just over max loads.

And what do you think is the best method to anneal?

thanks
Colin

[robbor]

I believe alot of guys anneal at about 5X so if you are noticing variations in neck tension it may be time.