Hey Seeking....dont give up. My 243Win was a real pain to dial in. Rem 700 with standard 1 in 9.125. I can confirm H4350 & IMR 4350 are very hard to beat for 90-100gr bullets. I settled for 100gr Pro Hunter (.010 jump) for deer and 95 SMK (.065 jump/mag length) for long range target. A friend tried the 105 and it wouldn't stabilize them. My 223 & 308 were jokingly easy to tune compared to my 243. I think it's a good thing to remember 243Win is an "overbore", even more than a lot of magnum cartridges. I did try H4831 and some H1000 and it would never tighten. Let me know.
				
			 
	









