I'm running a Sako trg chambered in 30-378 and was wondering how long these cases last. My load has been 122gr of h-870 for the last 500rds.[100rd lot] These cases have only been neck sized except once when I full lengthed them and trimmed. I am not new to reloading but I am new to the 30-378 with the freebore. This brass shows no sighns of presure and I've only had 1 neck split early on. How long do you guys think this brass should last?