.270 Winchester (using Hornady bullets)
Date: Sep 18 2012
The .270 Winchester was first offered in 1925 and has become one of the most significant and popular sporting cartridges around the world. It is ideal for deer and antelope in open country, and with correct bullets it will take elk, moose and other large game.
It has been published and repeated that as .270 pressures climb and approach maximum, if the handloader will continue to increase powder charges, pressures will decrease as velocities continue to increase. This is not true and should never be attempted! No credible lab will suggest increasing charges beyond maximum loads that have been pressure tested with the latest sophisticated equipment.
Classic .270 powders include IMR and Hodgdon-4831, but several more recent powders give outstanding results including Accurate 3100, Alliant RL-19, RL-22, 4000MR, Vihtavuori N165, IMR-4007ssc and Winchester Supreme 780.
The accompanying data was developed with a Winchester Large Rifle primer and should not be used in conjunction with any magnum primer, as pressures will increase beyond SAAMI guidelines of 52,000 CUP.