I am working on this old High Standard I have only when I feel bored with all other projects. My standard for the 16 is my dads old model 12 16 gauge that off a bench keeps slugs(cheap remington foster type) in a 5 inch circle if you do your part. All my ideas were dismal failures and this week I thought why not size the lee slug down to fit into the 16 bore with PC coating and another smaller sizer lets them fit into a shot cup. I am getting 3 to4 inch groubs at 65 yards so I think 100 might be reachable after all. Let you know after some more shooting!