Picked up a 243 shortly after they were released mainly because it appeared my 105 AMAX's had been reproducing and I had a sch!t load of them I needed to shoot.
Didn't spend much time fiddling with finding a load as it seemed to like the AMAX and 7828SSC right from the beginning.
A recent 100 yd range session on an ATLAS bipod...upper right are first two shots after taking the scope off/on, twisted down/left, then 9 rounds to confirm. It's been a blast to clank steel.
I agree with Don's statement between the two. Factory match offerings for the 243 seem anemic but handloading takes care of that.