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Old 10-03-2015, 11:19 PM
Drm50 Drm50 is offline
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375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30???  
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Default 375bb from 30/30???

Anyone tried blowing out 30/30s to 375 Win.BB? What was your
load? Wouldn't bother but have hundreds of 30/30s and 375Win
is hard to come by, and expensive when found. I had a couple
when they came out,still have the dies.
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Old 10-04-2015, 01:49 AM
Frank46 Frank46 is offline
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375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30???  
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Starline brass may come out with some 375 win brass but don't know when. I'd use their long 38-55 brass and form them and trim them. If starline does come out with 375 win cases buy a whole bunch as you and just about everyone who has a 375 win or marlin will be doing the same. From what I've read the 375 win generates about 55k in pressure, the 30-30 about 40k in pressure. I would think about reduced loads using cast bullets. And yes I have a winchester 375 big bore and fun to shoot. Frank
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Old 10-04-2015, 03:07 AM
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Default I think the 30-30 case....

Quote:
Originally Posted by Frank46 View Post
SFrom what I've read the 375 win generates about 55k in pressure, the 30-30 about 40k in pressure. I would think about reduced loads using cast bullets. And yes I have a winchester 375 big bore and fun to shoot. Frank
30-30 cases are rather weak. Though I'm not really knowledgeable I think Frank has it right.
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Old 10-04-2015, 07:08 AM
Ivan the Butcher Ivan the Butcher is offline
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375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30???  
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I tried making 38-55 cases from 30-30. The walls are so thin you have to anneal way down the body and end up with brass that barely handles black powder! (and are short!) Ivan
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Old 10-04-2015, 10:33 AM
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375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30???  
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Frank 46,

"I'd use their long 38-55 brass and form them and trim them." WHY??? The .375 is the same length as the .30-30, and, externally, the same dimensions as .38-55. Can you explain just exactly what there is to "form"? And why you suggest the OP should pay 50% more for the long .38-55 compared to the standard length, just so he can trim them to the shorter length that he could have bought for less?
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Old 10-04-2015, 12:36 PM
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The 375 Winchester lever action is one sweet weapon but the last time I bought a box of ammo it cost me $45 for a box of the 200 gr bullets.

+1 on buying a LOT of brass.
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Old 10-04-2015, 02:03 PM
Drm50 Drm50 is offline
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375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30??? 375bb from 30/30???  
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I've had the Win BB and a Marlin when first out. Have had several
On trade since then. I live in Ohio, we just got our 1st limited
rifle season last year. Regs, 38 or larger..straight cased. I feel
the flattest shooting rig you could put together is a single shot
375BB, loaded with 235g spitzers. Just bought a Ruger single
shot. I have 200 new 38/55s that I bought years ago, for my
old Marlin. I don't think 38/55 would be any stronger than 30/30.
The dies I have for 38/55 will load 375BB. I'm going to cut cases
and mic them. I bet in modern ammo (30/30&38/55) the web &
walls are same as 375BB.
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Old 10-05-2015, 02:28 AM
Frank46 Frank46 is offline
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As far as I know the longer Starline 38-55 cases were designed for rifles with the longer chambers. Buying the longer cases and forming and trimming back to 375 win will give the OP a case that has thicker brass at the mouth of the case and thicker brass where the bullet is seated. Frank
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Old 10-05-2015, 06:01 AM
lebomm lebomm is offline
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375bb from 30/30??? 375bb from 30/30???  
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I've had a Win 94 BB, a Marlin M375, a Ruger #3 .375, a Marlin 336CB in .38-55, and a 1910-made Hi-Wall .38-55. Found that the .375s would accept the .38-55 brass, so broke out mikes & gauges, and discovered that they ALL have .38-55 chambers.
As to factory brass, the W-W .38-55 is a bit longer than their .30-30, and the Canadian Dominion .38-55 is just a mite longer than that. They will all function without difficulty in all of my guns with about parallel accuracy.
Failing a case so long that it enters the rifling or jams the feeding arrangement, I'm not sure it makes much difference.
So yes, you can fire .30-30 in your .375 and eject .375, but they'll be short. I'll suggest a forming load of 8 gr. Unique, and top up the case w/cornmeal and a tuft of Fiberfill or similar.
Larry

Last edited by lebomm; 10-05-2015 at 06:09 AM.
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Old 10-05-2015, 08:07 PM
Yorkie Man Yorkie Man is offline
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I have had a BB94 for over 35 years and used the 30-30 cases for my cast bullet loads. I have sectioned both the 375 and 30-30 brass and the 375 is a lot thicker near the head than the 30-30. I would not use 30-30 brass to develop any maximum 375 loads. The Hornady dies I had originally would expand a 30-30 case without the need to fireform them.
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  #11  
Old 10-10-2015, 07:28 PM
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Alot of controversy on the net on this topic, and since I got my 94BB in 375 last winter I have researched it quite a bit.

General consensus I have found is that of the 3, 38-55 brass is the thinnest, then 30-30, and the thickest being 375 Win brass. Lots of guys fire-form 30-30 brass but due to it's thinner walls and max listed pressures for the 30-30 compared to the 375, they don't crank them up to full 375 pressures. And most guys that run 38-55 brass keep things at 38-55 pressures. Of course there are a few that fire form 30-30 and run them right up, but from what I am able to gather, these fellows are in the minority.

Of course, this is only what I have gathered and is not based on my own experimentation. I too am waiting for 375 brass to come back into stock. Luckily I have 26 brass I got with the rifle as loaded ammo.

And on the Starline front. I emailed them last spring inquiring as to whether they would consider making 375 Win brass. I told them I felt it was about guaranteed to be a winner for them and suggested they look at what people are actually paying for brass on GB. I got a reply from Hunter Pilant in which he stated that Starline does in fact have plans to start making 375 Win brass. At the time he said they had hoped to start this summer.. Summer has come and gone, and I am still waiting/hoping that our friends at Starline help us out. I suggest every 375 Win owner that is tired of the market on this brass drop a line to Starline asking them if they will start making it for us.
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