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Join Date: Jun 2011
Location: Clinton Co. Pa.
I use no. 11 caps and pyrodex RS in my T/C White Mt. Carbine .54 cal. It works fine. Can't say about the 777 as I have never used it.
U.S. Army Infantryman(11B20-Sgt.) 1978-82
172nd Arctic Light Inf. Brigade (Alaska)
9th Inf. Division