Ruger Single Six (original run) with 6 ½” barrel and .312 throats (pinned). Bullets cast of COWW + 2% tin, AC’d, initially sized/lubed with BAC or NRA 50/50 in .314 H%I die (313631 & 311316 GC’d with Hornady GCs) then sized .312 in Lee push through for use in Ruger. Cases all were Starline 32 H&R and primers are WSPs. More @Wikipedia
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