I no longer believe its barrel heat that causes groups to open up, but rather that 3 shots is just not a big enough sample to be an accurate indicator of where the next shot is going to go.
Yep!
I think there's a lot of merit in that. I'm going to shoot a few 3 shot groups on the same target with my 308 Montana and see what I come up with. I'd be pretty pleased if the entire group looked similar to CT's.
Tanner
