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Old December 24, 2011, 01:02 AM   #1
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38-55 in a 375 winchester

does anybody shoot 38-55's in their .375 winchester.
I load up some 265grn lead flat nose gas checks sized to .377 in 38-55 brass @ 1850fps. I load 200 & 220 grn jacketed bullets(.375) @2300 & 2100 fps respectively in .375 win brass and my groups are nearly identical (2" for 38-55...1-1/2" to 2-1/4" for .375) albeit three inches lower for the 38-55, all shot at 100 yards through my Marlin .375
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Old December 24, 2011, 07:54 AM   #2
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NO exp with the 375 or 38-55 , but nice pic !!!!

I will say this though , in my limited exp of casting bullets for my rifles they will group better with a good bullet it likes , just lower POI & velocitys .
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Old December 24, 2011, 10:20 AM   #3
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Just an observation. As I remember, the difference between a .375 Winchester and 38-55 Winchester is not only the diameter of the bullet, but the 38-55 cases were longer also. Warning to others, it is always best (safer?) to use the cases that have the correct head stamp for your rifle.
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Old December 24, 2011, 10:26 AM   #4
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Recent production - recent YEARS of production - .38-55 brass has come up short. No reason not to use it in .375 Win.

Just don't put a good stout .375 in your Ballard.
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Old December 24, 2011, 03:11 PM   #5
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my understanding is you can run the 38-55 in the .375; but don't try the other way around (due to excessive pressure,),
as the older 38-55 guns (20-28,000 CUP) were not built to withstand the .375 pressures (35-45,000 CUP). I researched before attempting this,
speaking to several gunsmiths, and referenced some older gun articles/writers.
The smiths that I talked to said; the variance in case length (38-55 .045"-55" longer) would not be significant as that case is thinner at the mouth.
And that it would be like a 38 spl/357 mag or 44 spl/ 44 mag.
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Old December 24, 2011, 05:01 PM   #6
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OK, so it can be done. Since you reload, the question for me is why do it?
Those who beat their guns into plows, will plow for those who don't.-Thomas Jefferson
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Old December 24, 2011, 06:49 PM   #7
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Lyman manual number 49:

"Never out a 375 Winchester round into a 38-55 Winchester. Nor should you attempt to use 38-55 ammo in the 375 Winchester. Incompatible neck diameters can cause a serious hazard."

As mentioned maybe you could look to load some lower power cast loads in 375 cases as an alternative.
Never argue with morons, they will lower you down to their level and beat you with experience.
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Old December 24, 2011, 11:41 PM   #8
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when I purchased the rifle several years ago, there were no 375 win brass or bullets or primers or even dies available on the shelves at my local store and internet sources, all that was available at the time were 38-55 components. I think it was 3 months after the Obama election and I went into the store and everything was cleared out. The salesman asked if I lived in a cave and said that once the election was confirmed, there was a run on everything. And 2-3 months back order on everything. So there you have it. I have since only shot components loaded in .375 win brass, so I stocked up when everything was available again, I probably have 1000 rnds of components now, but it's nice to know it would work in a pinch.

Last edited by tahoe2; December 24, 2011 at 11:48 PM.
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