Thread: Reloading 7mm Rem mag

The type of sizng die you use wouldn't do anything to stop that bit of the case expanding. It's caused by shooting repeated hot loads and the problem is that once it has expanded, traditional sizing dies can't touch that bit of the case to rectify it. But if you just don't repeatedly shoot hot loads then you're not gonna have that issue.

How many reloads will you get? The spiciness of the ammo vs the dimensions on your chamber vs the dimensions and toughness of the brass and how meticulously you care for it... that's what will give you an idea of how long that piece of string is.