Brian
in those days only du pont made 4831
if you see an old lyman reloading manual you can see that 4831 was a du pont powder adn was what Jcak used for his 270 .
loads for almost every caliber are a lot less today than older reoading manuals.
for example Remington loads his 7 mm Rem mag in...
Why don't use the loads of the late and grate Jack O'Connors
IMR 4831 - 150 gs bullet - 59 gs
IMR 4831 - 130 gs bullet - 61 gs
I had proved it and are outstanding
In my oppinion Noslers Bal tip bulletsare excellent for mid game , despite it tends to blow up if velocity is high
In my experience in several calibers ( 257 Wby , 308 Winch , 280 Rem , 6,5 x 68 , and 22`s obviously ) if you shoot at maximum velocities sometimes it tends to dsintegrated on skin...
I have bought a 458 Winchester magnum rifle .
I would appreciate if someone give load data with Rottweil 903 or other powders.
Here in Uruguay there is no possibilities of purchase american components usually
thank in advance