The only Olympic 243 upper I've seen was the 243 SSM. I've been tempted to get one as well, but for the cost I'd rather throw that money into an AR10 platform and build one in 243 Win.
I've had at least one 6x45mm/6mm-223 for the past 15-20 years or so. I have often thought about getting a 6mm TCU reamer to open up the chamber some. I think the ease of just using the 6x45 die on 223 brass beats out any gains you'd acheive by going the TCU route, plus you'd add the fire form step.I built one in 6mm223 nice caliber but ya run out of places to put the powder in the case with long bullets... I like it anyway for shooting 95 gr bullets.. B2B
Thanks guys! I am not fond of the 7.62x39, good cartidge in a short AR or AK. I want something that will reach out there a little ways. I believe if I get some of my other guns sold I am going to build a 243WSSM. I looked the balistics up on that cartidge and I think it will work good for what I want.