Re: barrel breakin
I've only tried "breaking in" one rifle so far. Now all I have to do is get another 5000 rounds shoot through it to tell if it was worth the trouble.
In order to really tell if it makes a difference a person would have to start with 2 rifles, break-in one but not the other, keep the round count exactly the same until there was a very obvious difference in the group size. More trouble than most of us would be willing to go to.