Thread: Load data - 270 win IMR 4831

Greetings,
The actual projectiles you want to use, rather than just the weight, have a big influence on maximum charges so it is best to find data for those. The solid copper types and some of the enhanced expansion types need charges reduced from the old cup and core projectiles. Online data for the actual projectile you intend to use should be your first stage. The Hodgdon data which includes IMR4831 often lists data for more than one projectile of each weight which should be your next stage.
Regards Grandpamac.
PS. Didn't read your whole post. The Hornady SST projectiles are a reasonably soft cup and core projectiles so the data from your Hornady Manual is a good place to start. Make sure that you chronograph as you go as velocity is your best indication of pressure.
GPM.