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March 24, 2024, 09:36 PM | #1 |
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375 H&H to 375 Weatherby fire forming
Picked up a bunch of almost affordable of 375 H&H brass for my 375 Weatherby. I could load up some mild loads with cast bullets to fire form them, but I'm wondering if there is a cheaper option? I have heard about using pistol powders, corn meal, and cotton balls.
Any good recipes that will save me some money? |
March 25, 2024, 02:34 PM | #2 |
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You do realize that what ever method you use, your formed cases are going to be a little short, right??
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March 25, 2024, 10:27 PM | #3 | |
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Quote:
Or since all of my brass is H&H head stamped, maybe actual Weatherby brass is a little long... |
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March 25, 2024, 10:51 PM | #4 | |
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Quote:
By the specs, Wby brass has a max length 0.01" longer than the .375 H&H, and forming WBY cases by blowing out the body of H&H brass is going to make them shorter, yet. How much, I can't say, never did it, but it will get shorter. Shorter, in this case is better than thinner though. That much is certain.
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March 27, 2024, 07:45 AM | #5 |
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There is another current thread going on fire forming, including mention of the COW (Cream Of Wheat) cereal filler method. But I think this thread over at the Cast Boolits forum includes more detail.
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March 27, 2024, 03:24 PM | #6 | |
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Quote:
You'll also more than likely need to anneal your cases after FF. I actually had to anneal my cases before and after FF, because I was taking a .405 Win case down to 7mm with an 40⁰ shoulder. I ran the case trough three different dies (.35 Whelen, 8X57, and finally .280 GNR) to get a false shoulder and the neck down to 7mm. I lost about 50% of my cases during the FF process until I started annealing before FF. I'd usually develop a crack in the neck. You anneal after FF because you're moving a lot of brass, and it makes it very hard. In the end, I probably just should have purchased already formed brass from Gary Reeder. It was expensive, but it was probably cheaper in the long run than learning to FF brass correctly. Here is some .375 Weatherby brass.
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March 30, 2024, 11:59 AM | #7 |
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I posted this over on LRH.
https://www.longrangehunting.com/thr...recipe.303247/ I think they will let you visit and see the links. I’ve had good luck doing this method. IMO, this can be a low to moderate pressure way to push the shoulder forward instead of stretching near the base. |
March 31, 2024, 07:27 AM | #8 |
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Nathan,
Your LRH forum post is excellent, and I have bookmarked it so I can refer others to it.
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March 31, 2024, 08:49 AM | #9 |
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Thanks, I book marked it as well. Great post.
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March 31, 2024, 01:56 PM | #10 |
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I’m just glad the links still work
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