Shot some of both and in my opinion the 28 with a great 175/180 is king of the heap. Less recoil than the 30 and higher BC bullets until you get into the real heavy stuff and even then it’s not much better.
Just for grins compare a 175 ABLR at Nosler’s top speed with a 210 ABLR in a 30. See...
None of those are really “fast” powders. I’ve never seen load data for it before but that is pretty cool stuff. It’ll be interesting when things all get sorted out. It’s a truly neat cartridge. I’d love to have that capability in a Kimber Montana 84L sized rifle.
Hard to believe what we “got by with” when we didn’t have all the fancy stuff.
But I’m sure it was all pretty good when you got to put the atlatl down ;)
I have a Classic M70 264 and a new made 264 and both are pretty easy to situate most bullets to get into the lands and still be within the mag. The chambers they cut were made for old 2 diameter bullets so normal bullets engage the lands under 3.3” most of time. By normal I mean 127 LRX, 140 ABs...