Reloading for the 1891 Argentine Mauser – Part 5, by Tunnel Rabbit
(Continued from Part 4.) Temperature Stable Powders I will use temperature stable powder in these rifles so that during summer time temperatures, my previously safe-to-shoot cartridges is not adversely affected by an increase ambient air temperature or while chambered in a hot rifle barrel. H4895, H4831, H4350, and Varget are my top choices. I engineer a wide margin of safety for powders that are not temperature stable and settle on a lesser weight charge. Accuracy can often be found at lower pressures when using lighter projectiles and at higher pressures if using heavier projectiles. Good accuracy for lighter projectiles is …