Loading for 8 X 57 JR??

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I am interested in this mold for my Drilling in 8 X 57 JR (.318″). Has anyone been using this mold for this cartridge? Have you used any other molds for this cartridge? Results?
Thanks!
Jim
SC325-180-RF RG2 cavity GC
[325-180G-RF-]

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[adamsutherlandModerator]

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Welcome to the forum.

What sort of velocities are you looking at?

[craigthompsonParticipant]

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I have one drilling we’ve had for maybe 40 years and never fired !

I always thought it was the 8x57JR but in actuallity it’s the 8x58R Sauer cartridge .

Anyway since I recently got a renewed intrest in the old gun I plan on using the RCBS 32-170 GC mold sized at .321″ cast from straight wheelweights .

[ericstevensParticipant]

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I have a combination gun that is 16ga over 8x57JR.  I managed to luck into a couple of old boxes of Norma brass at a gun show for not much $, and then bought 8×57 dies.  I had a mould for a tapered 200gr intended for 32-40 schuetzen loads, so cast some 25-1, panlubed, and loaded over 18gr AA5744.  The 50 yard groups (with iron sights) were such that I didn’t do any further load development.   I’m sure that with a GC you could push ’em faster, but my gun is pushing 100 years old and a work of art!

You might want to check the throat diameter a buy a mould that drops close to that diameter, particularly if you have a .318″ groove. 

BTW, 18gr AA5744 will work with weights from 175-250gr.  16gr 2400 works great under a 180gr in my 8×57 Turk.

[Author]

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