Behind the Bullet: .243 Winchester | An Official Journal Of The NRA
https://www.americanhunter.org/content/behind-the-bullet-243-winchester/
WEBMay 12, 2017 · The .243 Win., with its 1:10” twist, can stabilize the 100- and 105-grain bullets, which the hunting public wanted for deer and other big game. Not that you can’t hunt deer with a 90-grain bullet, but the hunting market is what it is, and the .244 fell far behind the .243, with Remington renaming its cartridge the 6mm Remington.
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