I'm sure this is a simple procedure, but before I tried it, I thought I'd ask.

What is the process to make 340 Weatherby brass out of 375 H&H brass. Or would it be better to go up from 300 H&H or ???

Just looking for a cheap source of good brass rather than pay the premium price for Weatherby cases.

Much obliged, Joe.

JMac-Ihave found that the easiest is to go from 300 wetherby to 340 weatherby. Cases are cheap from remington and it works great. I however have only gotten 3 reloads per case tops, so far using this method. MD

Maddog,

Have you been annealing the cases after sizing? Do you use a wax? Do you just make one pass with your 340 wby die?

Thanks

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Use some Imperial Size Die wax and run them throught the Fl die, it should work fine.
I took 404 jeff brass down to 7mm using 375 then 338 then 300 and finaly 7mm form die. The 375 to 338 was the easiest step, no problems were seen untill I got down to the last step to 7mm.

Another good case to use, to make .340 Weatherby Mag brass, is the 8mm Remington Magnum. I haven't actually tried it myself, however.

-Bob

I'd hesitate to use 8mmRem mag brass. If you do, just make sure it will never be in a situation where someone would be tempted to chamber it in a 8mm. That could be disastrous.

With Weatherby reviving the 375Wby, that would be the brass I'd look for. Less chance of a boo-boom. JMO, Dutch.

I've done this quite a bit, you just have to lube them (the 375 H & H cases)properly and run them into the 340 Wby die. First firing ensures that they fit the chamber completely. Use a starter load from one of the manuals and go from there. Hope this helps - Dan

MADDOG's solution is by far the least expensive and simplest. I have gotten decent life out of my handloads. I buy 100 case boxes from Midway for $40 and a single pass through the sizing die is all that is required, no fireforming or setting back of the shoulder (necessary on the 8 Mag).

Ditto Harold and Maddog--I make mine from 300 wby with a redding tapered expander. Just "open em up" load em, shoot em.!

Thanks for the advice. I was thinking that just necking the H&H cases to the proper diameter and firing was what it would take.

Much obliged, Joe.

Bill- nothing special just run them through and load them up. MD

Maddog,

I have been loading the Mopar stuff from Weatherby. It is a bit $$$ but I get at least 10 hots loads from a case without annealing. I am wondering if there is a way to get nearly as many from the Remington Brass??

I was also wondering if the case capacity was very different.

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