Process for forming ppc from 7.62x39 cases

[Ogre6br]

HI
I want to get the process of forming ppc cases from 7.62x39 boxer primed brass.
I have googled, yahoo'ed, meta searched- still cannot find a detailed process of converting 7.62x39 to PPC- the tools required and the steps to take.

Unless someone tells me a different and better way I plan to run the brass through an intermediate necking down stage,7mm or 6.5mm), turn the excess neck thickness off, anneal the necks, size to approx 272-274 thou in a Redding bushing dies and then turn to .268,loaded) for my 272 chamber. Load with 70 TNT's seated long and starting loads of Varget or Benchmark and fire form while I hunt.

Can you run into problems if you put to little heat into the necks when attempting to anneal the brass??

I'm looking to build a gas torch and conveyor to be able to do bulk brass conversion from 7.62x39 to 6 PPC and want to anneal the necks after the first pass through the neck sizing die. I am trying to calculate how quickly to set the conveyor so the cases are exposed to the flame for the correct amount of time.

The cases will then drop about 2 feet to a bucket of chilled or iced water. Can the water be to cold for quenching and cause shock embitterment from the rapid cooling??


I know it would be easier to just buy 6PPC USA Sako cases loads and use but at $160+ per 100 -don’t have the money. $20 per 100 for 7.62x39 and some,many) hours of my time I can get what I need.
Hours I got. $$ I don't.

Thanks
Heaps
P

 

[Forum Boss]

Sounds ingenious, and we admire the pluck, but consider that you can get Lapua .220 Russian brass for $47/100 from Brunos.

Then it's a simple process of necking up. If you have a .272 chamber, you probably wouldn't have to neck-turn that way. If you do neck-up, use plenty of lube inside the neck and on the mandrel because those Lapua necks are strong. You'll then want to FL size to square up the neck-shoulder junction before

If you don't want to neck up, you could just fire-form with pistol powder and wax,no bullet). That would blow the case/neck out to exactly fit your chamber. Check on Benchrest.com for more advice on this, including the type/amount of powder. You don't want to over-charge.