RE: Match Brass
ddavis263,
If you switch to match-type brass, you will definitely need to drop your powder charge some. For a non-maximum load, I usually start with .5gr less and work that area........figuring that it takes about a .5gr change to show up on most targets anyway.
With a max load like yours, I would drop back 1.5 to 2gr and then work back up in smaller (say .3gr) increments.
"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)
Trust God..........but keep your powder dry!