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#6112852 - 01/30/12 06:17 PM Anyone use a 375 winchester?
243kid Offline
Campfire Regular

Registered: 11/24/09
Posts: 306
I was thinking of reboring a 30-30 to a 375. Just wondering if anyone has any experience with this cartridge and how did it work on game?

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#6116088 - 01/31/12 03:01 PM Re: Anyone use a 375 winchester? [Re: 243kid]
mtrancher Offline
Campfire Regular

Registered: 09/25/10
Posts: 534
Loc: Eastern Montana
Puts a 'whomp' on 'em within 200 yards.

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#6116097 - 01/31/12 03:04 PM Re: Anyone use a 375 winchester? [Re: 243kid]
william_iorg Online   content
Campfire Regular

Registered: 05/07/03
Posts: 852
Loc: West Texas
I have a Winchester. The 375 kills our little deer and pigs quickly. I find deer are put on the ground quicker using the 200-grain Sierra bullet than with heavier bullets. The 200-grain Sierra bullet is tougher than you might imagine and retains its weight well with close shots and penetrates deepl and straight on both close and longer shots. I have not shot deer at distances much beyond 100-yards.

For light loads I like the Lee 255-grain cast bullet. This bullet was made for the Winchester as it fits the throat well and shoots accurately in the Winchester.
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#6119016 - 02/01/12 08:08 AM Re: Anyone use a 375 winchester? [Re: william_iorg]
mtrancher Offline
Campfire Regular

Registered: 09/25/10
Posts: 534
Loc: Eastern Montana
My pet load is 39.5 grains of 1680 under a 220-grain Hornady. Very accurate in my Marlin.

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#6154191 - 02/09/12 02:54 PM Re: Anyone use a 375 winchester? [Re: 243kid]
dph Offline
Member

Registered: 12/05/11
Posts: 17
Originally Posted By: 243kid
I was thinking of reboring a 30-30 to a 375. Just wondering if anyone has any experience with this cartridge and how did it work on game?


If you rebore a standard Winchester 94, I would only shoot 38-55 level loads through it. A Marlin 336 might be ok, but the Winchester 375 (Big Bore) is built on a different receiver (reinforced)than the standard model 94 30-30.

To answer your question, the 375 is substantially more powerful (IMO) than the 30-30. I also shoot 38-55s through my 375. But, I have taken whitetails with 30-30, 38-55, and 375; seriously, I don't believe that any one of the three was any more deadly than the others.

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#6154382 - 02/09/12 03:46 PM Re: Anyone use a 375 winchester? [Re: dph]
shdwlkr Offline
Member

Registered: 09/02/08
Posts: 158
First The .375 winchester requires a much stronger action. So if you use a regular model 94 action and put a .375 winchester barrel on it don't be surprised when parts come flying back in your face way to much pressure for the action.
Second as to the difference between the 30 and 38-55, 375 there is not the same bullet weight, even the fps isn't the same. Now as to killing power nope other than a bigger hole for the larger bullets which means more blood loss.
But if you are going to look at it that way then we only need one caliber either a 30-06 or 30-30 would be all you would need. The old 30-30 was used even on the big brown bears so I guess we could say all you need is the old 30-30 for everything.
But then look at all the other choices we would not need, nope no fun there need options in everything.

Besides I have two .375 winchesters and also a lot more levers in other calibers and even a few bolt actions and even some muzzle loaders.


Edited by shdwlkr (02/09/12 03:47 PM)
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#6156258 - 02/10/12 05:31 AM Re: Anyone use a 375 winchester? [Re: shdwlkr]
william_iorg Online   content
Campfire Regular

Registered: 05/07/03
Posts: 852
Loc: West Texas
While the Winchester Big Bore rifle does have a stronger action I would not underestimate the strength of the Winchester Model 94, especially the Model 94AE action.
I have experience loading Winchester Model 94AE and the Marlin 336 rifles reamed for the 30-30AI cartridge. While I have no way of determining the exact pressure I have loaded the 30-30AI to high velocity for several years. I am not alone in this and my rifles exhibit no sign of distress.
Searching the internet will allow you to see pictures of several Marlin 336 rifles with actions which failed in the barrel thread area. The only picture of a Winchester Model 94 I have seen which has failed in the barrel thread area been the rifle pictured in P. O. Ackleys book Handbook for Shooters and Reloaders, Volume 1.
Several years ago there was a thread on the Leverguns forum discussing a Winchester Model 94 and a Marlin 336 barreled for the 454 cartridge. Both rifles yielded in the locking lug area after a short number 454 cartridges had been fired through them.
My experience with the 30-30AI cartridge indicated the Marlin 336 would not accept as high pressure as the Winchester Model 94AE. I am a fan of the 307 Winchester and after reading many internet reports of remarkable possibilities with the 30-30AI cartridge I decided to compare the two cartridges. While exploring the upper limits of the 30-30AI cartridge I loaded above my stop points looking for a margin of safety If I was going to share loading information on an open forum I wanted to be confident I was not on the edge of disaster. The Winchester Model 94AE was able to equal and exceed the velocity of the factory loaded 307 Winchester cartridge but not at a pressure level I felt comfortable with. The Marlin 336 was not able to reach this pressure level, the rifle exhibiting sticky extraction and alarming case growth (stretch) prior to reaching 307 Winchester velocities. If you experience sticky extraction with the 30-30AI cartridge you are well above prudent pressure levels.
When I posted these results on the Leverguns forum Myron Rockett was kind enough to post about his .308/444 wildcat and its standard Model 94 rifle. This rifle has been digesting 307 Winchester loads for many years with no distress.
I suppose my point is both the Marlin and the Winchester lever action rifles have adequate strength for the cartridges they were designed for with a good margin of safety. Christian Helbig wrote several articles of high pressure loading for the 38-55 in years past. While Helbig did not load to 375 pressure levels he did load the 38-55 cartridge to high pressure.
I would not suggest having an old rifle re-bored or re-barreled for a high pressure cartridge but I believe the Modern Model 94AE is as good a candidate for this conversion as Marlin 336.
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#6163067 - 02/11/12 05:04 PM Re: Anyone use a 375 winchester? [Re: william_iorg]
william_iorg Online   content
Campfire Regular

Registered: 05/07/03
Posts: 852
Loc: West Texas
Take a look at this thread while you are in the thinking stage.

http://castboolits.gunloads.com/showthread.php?t=143162
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#6293372 - 03/14/12 10:32 PM Re: Anyone use a 375 winchester? [Re: william_iorg]
Orchemo Offline
Campfire Ranger

Registered: 08/24/07
Posts: 2366
Loc: Oregon
I have a Marlin 375. I shoot cast 265 gr bullets and it is a great shooter. I do not load to the full potential of the 375 Win, but the cast bullets are fun to shoot, accurate and plenty of hole for a blacktail deer in these parts.

With a full load 220 FP. Would easily drop a black bear.

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#6294349 - 03/15/12 09:14 AM Re: Anyone use a 375 winchester? [Re: Orchemo]
Just a Hunter Offline
Campfire Guide

Registered: 04/05/06
Posts: 2919
Loc: MT
When comparing the 30-30 to the 375 Win. what is the max pressure for each cartridge? In the Ramshot reloading pamphlet the 30-30 goes as high as 37,000 PSI. The cases are similar except for the diameter of the bullet and bullet weight so why couldn't a .375 Win. be put in a regular M94 Winchester.

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