Cowboy action shooting handloading data

For flexible usage, we provide our reloading data in metric and imperial dimension systems, i.e. charge weight in grams and grains as well as muzzle velocity in meters and feet per second. All the loads on these pages are pressure tested according to the C.I.P. method. The listed maximum loads should never be exceeded.

We wish you successful reloading with Vihtavuori premium powders!

DISCLAIMER

All of this reloading information has been provided by Nammo Lapua Oy and Nammo Vihtavuori Oy. The data given here were obtained in laboratory conditions following strictly the CIP (Commission International Permanente) June 13, 1990 and November 9, 1993 rules. The listed maximum loads have been determined according to the respective CIP/SAAMI maximum pressure specification, whichever is lower. These test methods have been deemed to be safe throughout the world. Pressure is measured at the case mouth or from inside the case according to the CIP.
DO NOT ATTEMPT ANY EXTRAPOLATIONS. PLEASE FOLLOW THE DATA AS WRITTEN. IT IS A MUST FOR EVERY RELOADER TO READ THE RELOADING SAFETY RULES.