Don't know if this helps. I have reloaded for the .243 for 40 yrs. BUT, I don't shoot as much any more and I just buy a few Plain jane factory loads at Wally world. Most shoot just as good as my handloads. I shot it a week a go. 80, bullets cut a 3 shot ragged hole at 100 yds and 100 grn for deer went 3/8" with Remington brand loads. I chronographed them and was supprised 2950 for the 100's and 3350 for the 80's.
You can't help but want to reload for a .245, my all around load was an .85 grn at a little over 3200 and my deer load would crack 3000 . I have a 22"bbl. The best barmit load I ever used was a .75 grn hollow point at 3370. There wasn't a ground hog too far away to shoot at and reguardless what the guys say about .22 centerfires. The .243 will out do them anyday of the week especially if there is a little wind.
I hunted P dogs once with my .243 a light sporter, and it out shot any thing at the pasture including the mighty .220 swift at the end of the day I had more hits per shot than anyone else !