Thanks for the chat guys. I guess I'll just headback out to the range. As many of you have suggested, imperical data is the only true guide. I'm still working my way up 1/2 grain at a time with my hand loads for my 220 Swift.
I do believe the fact that my groups get better as the day goes along is probably more a result of the fact that I need more trigger time than any thing else.
Every evening, when I clean the rifle, I get a lot of copper fouling out of the barrel so I know that should make my groups get larger, not smaller. There are so many variables that mix together on any day that it must take thousands of rounds with careful note taking before you can get a handle on what is causing what.
Fortunately I have nothing better to do with my time.
I think you are on to something there. But, sometimes people still need to talk.
I know of 2 people. Father and son. Both have been on The World Benchrest Teams. I don't know them well. But, nice folks. Their best advice.
Show up for the matches/tournaments. That is the best practice.
Take very good notes. And use them.
I was told. A few years ago. They shot 6000 rounds one year.
I saw Jack Neary clean out his Explorer. More like dump everything on the ground. He had a bunch of Note books. 10-20 maybe. He's always writing.