Barrel lapping jig

 Does anyone know of a member with a lathe that would sell lapping jigs in 177,22,25,and 357? I can make a standard jig that requires you to repour the lead every so often. I am looking for jigs that have the screw in the top that you can tighten to swell the lead jig instead of pouring multiple jigs. 177 may be impossible to do that but if they can cool. Anyway if you or someone you know makes lapping jigs id reimburse you for your time and materials. Thanks guys
 
As you state, this approach requires the lapping slug to be poured into the specific barrel you will be lapping to ensure it is a precise match. In fact its indexing needs to be maintained as well. Maybe I'm missing something but does this mean you intend to send your barrels to this 3rd party for the purpose of them making some lapping slugs for you? 
 
No dude just a jig that is threaded so i can pour lead around it then screw the bolt into it to fatten the lead with each turn. I have seen a couple jigs made that prevents the need to repour 3 to 4 times. Instead they just tighten the screw and keep lapping without repour. I can burn off a brass brush and do a lapp job myself but with 12 rifles id rather pay to make a more efficient jig. If you atill dont understand pm me and ill link a youtube video that will show what im talking about.