Gentlemen,
Nothing against any of you. We all have opinions about many things. Opinions are however, just that unless supported by facts. Concerning the accuracy of the .243 Winchester, here is one hard fact:
John Whidden took his wife's push feed M70 and rebarreled it to .243 Win. I know this because she told me! Anyway, what he did with that .243 is history, winning the NRA National Long Range Championship in 2017:
The five-time NRA High Power Rifle Long Range Champion shares the advantages of using .243 Win. in competition
www.ssusa.org
From Accurate Shooter:
"John Whidden of
Whidden Gunworks has won his fifth Long Range National Championship, his second title in a row (he also won the LR Title in 2016). This year, competing at Camp Atterbury in Indiana, Whidden pulled together a gritty, come-from-behind victory. John won the title by shooting a perfect 450-28X (not dropping a point) in the final Palma match on the last day of the Long Range Championship. While Whidden, who finished at 1246-91X, edged runner-up Phillip Crowe (1245-68X) by just one point, John enjoyed a
huge X-Count margin. Finishing third was past High Power and Long Range National Champion Nancy Tompkins (1244-65X)."
If you do not know, NRA Long Range (and High Power) matches are shot with only a sling for support. No bipods or other "artificial support" allowed!
Whidden was not a tyro (rookie) to long range shooting, winning the same Long Range Championship in 2007, 2008, 2010, and 2016. For 2017 and he had to best the well funded Army and Marine teams, and civilians like David Tubb, Nancy Gallagher Tompkins, and Middleton Tompkins. That Whidden, a very experienced High Master, 4-time previous champion, selected the .243 Win for his long range rifle, speaks for itself.
There are of course .243's in bad rifles and even more bad marksmen shooting them. Then there are fools who think any 6mm bullet is a good choice for elk, moose, or tough African plains game. As Ruark wrote, Use enough gun!