I bought 800 rds of the win. white box 40 count for a prarie dog shoot.Shot around 400 and i had quite a few w/ cracked necks that i found when handloading them.
I use the same amount of pressure on each case during necksizing but get inconsistant neck tension for some reason.
Remington brass is all i can get for my 221 FB ,only lost a few cases and they been loaded 4-5 times and neck tension is more consistant.
It is suppose to be the other way around win. better than rem. but i haven't seen it.
I don't weigh/sort or go to great lengths w/brass so take this w/a grain of salt.Mike