I use RMC for my 10 gauge and Magtech for 12 & 16 gauge. I use real black powder for all the gauges in Cowboy shooting.
RMC: Uses 209 primers and standard sized wads. Some cowboy shooters have reported 3000+ loading; Hulls are very well made, but expensive and delivery times MAY be slow. If using BP de-prime soon after shooting, primers can rust in place and then you need to drill out the primers. RMC are CNC'd out of bar stock and come in different lengths
Magtech: Uses large pistol primers and requires using oversized wads: 11 gauge for 12 gauge & 14 gauge for 16 gauge. Hulls are much cheaper, however may be hard to find since Covid. The hulls appear to be stamped and the thin brass can make reloading the shotgun fast tricky. Hulls for 12 & 16 gauge are 2.5" only.
RMC quality is very good, but the last time I looked you could get a box of Magtech for about the same price as 3 or 4 RMC hulls
Last edited by Chantry; 06/13/23 02:50 PM.