Yeah. I think the 140gr has slightly better BC, but not as good as the 147gr. I've also seen gel testing of the 143 ELD-X vs 140 ELD-M and they are very close in performance. 140 just seems to be a pretty good all-around go-to and the bullets are a lot easier to come by.pretty nice for the factory.
i did not see much benefit from using 143 vs 140gr, and stick to 140gr. i bet if you will play with reloads you will shrink that group down quite a bit.
i posted that before, but, anyway - it may help if you did not see it before:
6 & 6.5 Creedmoor Load Data – What The Pros Use
This past year I asked the 173 of the top-ranked precision rifle shooters in the country about the ...precisionrifleblog.com
i stuck with 41.8gr loads of R16 and it is so far working out pretty damn good.
Maybe I'll try playing with 147gr down the line if it can be loaded to mag-length. But probably won't do it anytime soon.
Edit: I'm surprised, looking over that list, at how popular the small rifle primer 6.5 CM options were. I would have thought large rifle primers would provide for more consistent burns and MV, compared to small rifle primer. But if small rifle primer are being effectively used, I think I'll go that way when getting new brass. Then I can just use my 5.56 primers.
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