243 vs 257

[Rocky Raab]

I think a lot of it has to do with the bullets (and may no longer be true).

Some time back, 6mm bullets were somewhat unpredictable: some would expand and others would not. Bullets from the same box might act differently.

But 257 bullets worked, time after time, as reliably as the sunrise. Maybe it was consistency of the jackets, maybe it was due to better design, or maybe it was just that seemingly miniscule difference in diameter that tipped the balance by virtue of added rotational force.

Whatever the reason, quarter-bore bullets always worked but 243 bullets sometimes didn't.

Today, that may no longer be true. Engineers by now surely know how to build a 243-inch bullet that expands reliably.

I'm a fan of the 25s. If it were my choice, I'd opt for the 257 every time - and have.