RCBS custom bullet seater for 357/38?

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06-09-2018, 10:47 PM
DEVERS454

RCBS custom bullet seater for 357/38?

Does anyone know what the comparable machine screw would be that fits the RCBS dies for 357/38?

I am thinking of making a few custom ones on the lathe. Then use JBWeld to make an epoxy filled base to fit 180gr WFN, Sierra 158gr JSP, and Magtech SJHP rounds.

Thoughts? Could I get away with making it from aluminum instead of steel? Or maybe have the main part steel and just a replaceable end with 6065 or 7071 that the bullet seater would screw into?
06-09-2018, 10:53 PM
Char-Gar

1/2 nf
06-09-2018, 11:42 PM
Nueces

If you have a lathe (good on ya!) and want custom bullet seaters, I recommend looking at the Hornady sliding sleeve seaters. The working parts are simple turning jobs, no threads required - straight cylinder bored for bullet diameter and case neck; and straight seating stem with a small collar. I load nearly everything with them.
06-10-2018, 07:42 AM
Stephen Cohen

Quote:

Originally Posted by Nueces

If you have a lathe (good on ya!) and want custom bullet seaters, I recommend looking at the Hornady sliding sleeve seaters. The working parts are simple turning jobs, no threads required - straight cylinder bored for bullet diameter and case neck; and straight seating stem with a small collar. I load nearly everything with them.

I agree with Nueces, best non custom seating system going. Regards Stephen
06-10-2018, 10:12 AM
DEVERS454

Quote:

Originally Posted by Char-Gar

1/2 nf

That 1/2-20 (NF), correct? I see this listed, but, I wanted to be 100% certain.
http://rcbs.com/Products/Accessories...gs-1-2-20.aspx
06-10-2018, 10:57 AM
Char-Gar

Quote:

Originally Posted by DEVERS454

That 1/2-20 (NF), correct? I see this listed, but, I wanted to be 100% certain.
http://rcbs.com/Products/Accessories...gs-1-2-20.aspx

OK, I am glad you double checked as I was wrong. I grabbed a seating stem out of a die in my press and it was 1/2 X 20 (National fine). I doubled checked just now and it was a Lyman seating die.

I went to my die cabinet and took out a real RCBS 1980 seating die and the seating stem threads are 1/4 X 28 (National Fine). Of course the actual seating nose portion of the stem is larger at .356.
06-10-2018, 10:58 AM
DEVERS454

Well, I ordered an extra seater plug. I'll cut it back to where I can then drill/tap for a 1/8-32 bolt to go in then loctite it in place. Then do the same with the 7075 seater nose "bank" I will make on the lathe.

Surprised RCBS doesn't come up with a solution like this already for folks.
06-11-2018, 10:38 PM
wquiles

I have made several custom seater parts for my dies. My preferred material is 12L14 "leaded steel", as it machines easily and is more than strong for the job.