A long time ago I recall seeing a discussing, I think, on Shooters.com about making 43 Mauser brass from 348 Winchester. I recall that 348 Winchester was the easiest though I may be wrong. Does anyone have information about doing this.I know Bertram's making their 43 Mauser like this.Afriendof minewants to make brass for his43 Mauserhimself, hehas alathe etc. I don't think he's very experienced with his lathe but apparently has a machinist friend he can get guidancefrom.Any assistance is greatly appreciated.Thanks, Jim Cherry
My understanding of the .43 Spanish case manufacture is about the same as Buckshot"s. Some writers have stated that some .43 chambers "may" allow the use of the .348 case as-is, but the general recommendation is to thin the base and trim the rim somewhat before fireforming. Alternatively, a ring die and a hydraulic press could be used to swage the base down. The resultant case is somewhat short for the chamber, as well. These desperation measures were SOP in the Good Old Days when there was, literally, no other alternative (except maybe turned cases) but unless your friend wishes the experience of making cases, it would be much more cost-effective to buy them. Bertram, Buffalo, DKT and Ballard Rifle and Cartridge all make .43 Spanish brass now.
Buckshot, are Bertram cases any good now? When I bought 40 of them in .43 Basic ten or twelve years ago and trimmed them to .43 Spanish, I got 5 lengthways body splits on the first firing, with black powder. A couple or three more went the same way on the remainder the second firing, and it looked like I was going to lose a case or two on every subsequent firing. At two bucks plus a pop, that was getting expensive. On the other hand, a batch of 20 .405 basic Bertram cases, which I bought once fired about five years later, and looked scaly and horrible, formed into .35 Winchester with no losses, and have gone through about 10 firings, both with cast bullets and with full jacketed loads, with no loss. Hopefully, Bertram is getting a grip on their brass metallurgy by now.
You are correct. The brass I referred to was from Buffalo, not Bertram. The Buffalo brass is obviously made from 348 Win as a bit of the original head stamp is still visible.
I appreciate the info and will pass it on to my friend with the suggestion he "bite the bullet" and buy the brass.