Originally Posted by postoak
One thing else I changed was switching from 180 grain TTSXs to 180 grain Hornady Interbonds

This could easily do it. Guns are individuals. Even consecutively serial numbered guns from the same maker can vary a lot on which ammo they like. You're testing a SYSTEM of components ... that includes the ammo.

Tom

Anyone who thinks there's two sides to everything hasn't met a M�bius strip.

Here be dragons ...