Swaging Die Design -- Do I have this right?
Okay -- long story short. I like 410 slugs and am like addicted to them and have a personal ongoing quest for the last few years to develop the ultimate 410 slug load. As of current this is where my current slug development has led me:
http://forums.handloads.com/uploads/...e_10_Large.JPG
Left Side is the best factory slug load for the 410 available -- Brenneke attached base wad 110 grain-ish rifled. The other two are my prototypes in 1/2oz. and 11/16oz. weights. 1/2oz. works good and can be pushed to 1,500-fps out of a 3" hull while still staying within safe pressure limits making it a heck of a load but the 11/16oz. turned out to print nothing but key-holes out of a smooth bore. These are the penetrator versions -- Hardball alloy about 16-BHN will punch straight through and are fully capable of crushing bone. That design application has not yet been fully completed due to the fact that I'm waiting for a custom cut mold to arrive -- lead heads for initial test prototypes were made with a much slower process.
So while I'm waiting for the mold to get done I've been exploring the next stage a soft lead swaged head with rifling for applications where expansion is desired. The only practical way to produce such a head is via swaging rather then casting. So I'm going to try to get one of the machinist students at the local community college to make a project out of it. This is my basic design principle so far -- haven’t sat down and actual starting doing dimensioning of the components yet but I need some heads up on whether I've got the idea right or not. Basically the head is modeled after the Brenneke only with straight rifling. The bottom of the slug is flared so that when the plastic tail unit is inserted along with a drop of glue and the whole unit popped through a Lee 0.411" sizing die it will basically flatten out the flair and in the process crimp the slug head onto the tail. Intended alloy is pure lead or soft alloy not of 30:1 or less.
So anyway enough blabber, here are the drawings:
http://forums.handloads.com/uploads/...agging_Die.JPG
http://forums.handloads.com/uploads/...agging_Die.JPG
Thoughts? Pointers? Voices of experience?