I did a quick search - couldn't find the RMC kit. With the Magteck shells you need large wads like 11ga because the case is so thin. I think the RMC shells are turned on a lathe so they're thicker and may not need larger wads. Better check with them. A shotgun shell needs some sort of resistance to build up proper pressure, and that is mainly in the crimp, although the wad and shot also have some resistance. With a rifle the nose of the shell against the rifling gives the resistance. That's why shotgun and pistol powders interchange. It's the crimp in both that counts. You'll notice in shotgun brass factory ammo they roll crimp the OS wad. If you're not going to do that you better have some pressure on the OS wad when you glue it in or you may get duds. Just something to keep in mind. You won't have the problem with BP like you could with nitro powders.
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Paul Harm
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