Floyd----lots of particulars to this question that should be filled in before getting much into it.
Rounds per day?
Rifle weight?
Braked or not?
Shot off a table or off the deck?
Ranges of the majority of your shots?
I've done my share of PD shooting, and for me I just can't get behind the idea of a 243 for a pd rifle, too much recoil, it'll be hard on barrels and even tougher on the shooter.
The easy button would be a 223 AI, note I'd do the AI because you're a loader and it'll keep case trimming to a minimum and this will keep you shooting and not trimming
. 8 twist
Plus with a 223 you can spot your own shots and this is a huge help!
A lot of my days are 400 round or more days and I want not part of a 243 for those days....now for 20 or 30 rounds here and there I get it.
Fill us in a bit on what your days in the pd fields look like and we'll try to help out.