Speer data.

https://reloading-data.speer-ammo.c...25_caliber_257_dia/257_Roberts_P_120.pdf

They don't address accuracy, but do address speed.

DF


Edited to confess, ya gotta be a real hard core Loony to have every powder on that Speer chart... blush

Last edited by Dirtfarmer; 09/07/20.