My load of 22 shoots great, but out here during deer season it could be 90+ degrees one week and the next it could be snowing...

The 22 seems to be pretty cool, I can shoot 3 shots pretty quick then touch the barrel and it will be barely even warm...

I was reading about that 6CM (.243 with a slight shoulder increase) and they are getting 3000+ rounds out of it with H1000...