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Lyman also sells a mould that casts a short waisted slug that fits inside a 12 gauge cup and is supposed to give good accuracy. The slugs weigh 506g.r in WW metal and about 525gr. in pure lead. They call it a sabot mould as the field shooting plastic wad is the sabot. this wasted slug inside the shot cup might shoot well from a comercial rifled barrel. The twist is about right.

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Lee also sell a slug mold designed to be used with WAA12 shot cups. After an earlier thread about rifled 12G barrels on Greener GPs I did some googling for the Lee slugs, there were various reports, but enough positive to make me want to try the Lee before I'd go for the Lyman on a cost basis alone. The secret with shooting the Lee slugs seemed to be to put a felt wad in the shot cup before the slug so the slug didn't dig into the wad & distort it which seemed to adversely affect accuracy. I reckoned too that to trim the wad petals back to just behind the nose of the slug would ensure the crimp folds didn't push the wad petals over the nose of the slug preventing a clean drop off which might also affect accuracy. It will be nice to try the theory at some stage.
Steve

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