Thread: Typical cold/clean bore effect?

When I first got a Mossberg .308, I'd take it out, zero it, practice, take home and clean the bore.

Next time:"How has it lost it's zero"?

Re zero, take home, clean.

Next time: "How has it lost it's zero, didn't I do I properly last time "?

Eventually I caught on to the fact that when you clean the bore, you disrupt the conditions inside, and bust your zero.

I seldom clean the bore now, but when I do, I always re zero afterwards.