Bigger shoulders, (.462” vice .454” ),
30 degree shoulder angle, for less pressure variance.
OAL fits in a 2.8” magazine better with higher SD ( long ) bullets ,
without poking so much back into the cartridges precious powder space.

What more could you ask ?

I’d like one built on a 3.34” magazine , Sort of a 6.5-280 Improved 30, but with the CM taper & neck-shoulder dimensions.

Not quite a 6.5 Wby RPM , but almost.

Maybe in a 3.5” magazine, Ya Follow

History May Not Repeat, But it Rhymes.