Pressure sign/load development question

[Alpine01]

I started down this rabbit hole with 270 Win. Both that and 7mm Rem overlap in slower burn powders. I’ve never had outright separation though the occasional pronounced secondary belt has been a reason to discard. FL resize every time and need for speed has resulted in approx 10 reloads per case. Predominately R-P brass and it’s the primer pockets that give out. Any issue in the neck is remedied with annealing.

I started with new Peterson brass. Haven't annealed anything yet. Is this something I need to start?

 

[Don Fischer]

I started down this rabbit hole with 270 Win. Both that and 7mm Rem overlap in slower burn powders. I’ve never had outright separation though the occasional pronounced secondary belt has been a reason to discard. FL resize every time and need for speed has resulted in approx 10 reloads per case. Predominately R-P brass and it’s the primer pockets that give out. Any issue in the neck is remedied with annealing.

I never learned to anneal well but have attempted it on occasion. Issue with the neck for me is solved by split neck in which I simply throw away the case or necks to long and get into the lands raising pressure. Most people relate long necks to firing which probably does happen some but I've found the biggest cause of to long of necks is resizing. Pull the neck back over the expanding plug and seems they always stretch a bit, the plug pulls n the inside. I always measure over all length after resizing for that reason.

As for annealing, wish I was better at it. Might stop the split necks I get on some cases. I don't quite get that either as there one brand case that give me split necks before any other brand, usually 3 or four firings. Annealing might fix it, I don't know. But I've read about people getting ten reloads from brass and they credit annealing for it. I suspect light loads have more to do with it. If it were more powerful loads, before you would loose the case to neck or shoulder expansion you would loose it to enlarged primer pockets. generally I get about 5 loadings before I eel the pockets have enlarged to much. If I tried more to see whaat would happen, I have no idea what would and no desire to find out. Had a guy from back east tell me not to worry about it, simply glue in the new primer; just not into that. case's simply aren't that expensive. last new bag of them I got a number of years ago and best I recall were $30 a hundred! Reload five times and that's $30 for 500!

 

[Benfromalbuquerque]

I started with new Peterson brass. Haven't annealed anything yet. Is this something I need to start?

Only problem once the case neck doesn’t stretch like it did or you see a fine crack. Maybe every five reloads.