Last year, after shooting many different brands of ammo, I found that my .30-06 consistentlypreferred 165-168 grain bullets over 180's.

This Spring, the same rifle prefers 180's over the smaller guys. I'm the same guy I was, or so I think, so I'd like to take myself out of the equation.

The rifle has had a trigger job, and I've mounted a new scope on it. However, I don't see how these factors would have anything to do with the change in the groupings.

I have begun using bore foam for cleanings. Would this be enough to do it?

Curiously yours,

FC