The 300 Win Mag was the popular prone match cartidge before the 6.5 .284 came on the scene. Recoil without better ballistics was major reason for change.
That money’s already spent, in all I must have 65k A-Tips mainly in 4 calibers/weights and I’m happy to have them, despite challenges. This was a read of the 230’s from a while back.
It’s a little more complicated than Lapua mag won’t work. With the 250 A-Tip having come out, there is literally no .338 match bullet with its BC, and the .338 LM can not only not compete in BC, but it was actually hard pressed to challenge the 195 EOL in a Suam even before that, I’ll say that even a .284 with 195’s shot inside it. I have used it (none blow up, but I feel silly adding a ring to a 7’s hold). I’d be shooting 300 grain bullets with a lower BC, slower. It would be counterproductive.
If I were making 250 grain 30 cal bullets, I would anticipate that the Win Mag to be at the smaller end of what they will be shot with, and it’s actually probably the smallest cartridge feasible right there with their own 300 PRC. We do have to keep in mind that the absolute highest BC combination on the line recently was one extremely rare blow up away from winning the LR national match last year. It’s going to happen. Wasn’t long ago everyone swore by their .284’s, and now, they don’t.
I do realize that my twist rate isn’t needed for 230’s but it’s only a bit faster than the 8.5 minimum for 250’s, and I had them made for the 250’s.
Here’s the thing about the 230’s they don’t actually have a much higher BC than the 190’s, but the 250’s do, by a lot. And I think they may be the smallest shooting until the 110 A-Tip, which is an extremely good bullet.