6 Creedmoor and 243 Win, both with Berger 105gr Hybrids, both run 42gr H4350 at a near equal 3,010fps.
The CM has a Bartlein 7.8 twist and the 243 8 twist, both heavy palma contour finished at 24". Both are new barrels that I haven't pushed much yet. My last 243 barrel was the same and I ran 115gr BN DTACs at 43gr (3,010fps).

Both shoot fantastic, but I don't care for the bullet seating in the neck on the CM. I dropped a round or two and actually kicked the bullet a bit. (.015" off the lands in both)

Hornady brass on the 6CM from GA Precision, Win on the 243.

Overall I think it is a great round and without wearing a barrel out that is all I can really say about it. I got 3,000 rounds out of my last 243 Bartlein and 5 or 6 loadings on each win case. If I were to do it over again I would likely have passed on the 6CM and ran a standard 260.

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6CM on the bottom, 243 top. [Linked Image]


Fast is Fine but Accuracy is Final.