I was wondering what the thickness of the case walls is on actual .310 brass, so I checked around. Looks like on Bertram cases(Official From Aussieland Brass) at the case mouth the thickness is 0.125".
Thickness of converted Starline .32-20 cases: 0.008".
Thickness of PPU 7.62 Nagant cases trimmed to .310 length: 0.120.
Looks like, for a less-expensive option, getting a bunch of their 7.62 cases and trimming them would come very close to duplicating dimensions of the real thing.
4 comments:
"The Handloader's Manual of Cartridge Conversions" says to make from .32-20 brass, trimmed to length, sized in .310 die and fireformed.
.008 sounds pretty thin for the neck, though.
That's all the info I could find. Can copy and send the page if you want.
That's what we've been doing for it, and it works. And it beats paying about $5 each plus shipping for actual .310 cases from Australia, but it is a somewhat delicate case.
Found out that you can use the 7.62 Nagant cases, which are far more robust. Need to get a chance to try some loads with those at longer ranges.
Probably sent this before.
Here are some that are made in USA but still almost five bucks each after shipping, $3.87 plus $20 flat rate shipping.
So, $4.87 each shipped.
But they are made to actual size.
https://www.rccbrass.com/product/310-martini-cadet/
No, don't think you had, thanks. I'll pass that on to some people
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