I have a 223 and a 243 both are great shooters.
My 223 loves the 53 gr vmax over h4895 powder My 243 loves the 85 gr sbthp game king over h 4350 at 300 yds I can cover the groups out of both, with my coppenhagan can (redneck 1MOA) after 300 yds the 243 out shines the 223(especially in any wind). If I could only have one or the other it would be the 243. While no dought it cost more to shoot it is well worth it. The 85gr sierra hpbt is reasonable on fur too.
Thinking about the bergers any info would be great