The 6mm Rem sucks heavy ass,compared to the 243Win
I have the 6mmBR, 243, and 6mmRem reamers.
I have just built and in testing with a 6mmRem on a 1903 Turk Mauser action. I am having real problems.
This 6mmRem group this week was 1" at 50yards... it may not get to hunt.
One of my 6mmBR rifles has done a 0.1" group at 50yards.
I don't think the 6mmRem idea is bad. Just the necked down brass and some other stuff I must be doing wrong.