38-55 in a 375 winchester

tokguy said:
Not being argumentative; but you are worried about shooting lower powered, lower pressured round in a carbine designed for much more powerful rounds. That's like taking an SRT Hemi charger in a parade...it far exceeds what you are asking of it. The warning had to concern putting a 375 in a 38-55 I think.
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Correct me if I'm wrong, but the 375 was given a smaller bore for just this reason.
In so, a higher pressured 375 bullet going down a .379 ish bore is likely to not cause catastrophic damage. They couldn't build the longer cartridge like a pistol round because of OAL and cycling issues, so it was the next best idea.
 
Pet Loads says SAAMI dia for 38-55 is .3775...375 Win is .3756. But also recommend slugged 38-55 for best results.
Just a lil additional input, hopefully in a relevant way.
 
Where would you find 375 brass? I have called every vendor on this site as well as almost every vendor across Canada. I was lucky enough to score 2 bags of brass, but would like to get another 2.

double gun said:
X2 to everything what guntech pointed out. Plus 375 win brass isn't that hard to find. No you can't buy it at Walmart, but if you check a few decent reloading supply places you will find it.
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yep, shoot 3855 in your 375 but not vice versa~
I load my 375 like a 'hot' 38 load tho :) it works... and if doing so can resize 3030 brass
 
mike Crawford said:
So the end result is ...?? buy a 375 and shoot either 375 or 38-55 .. sounds like I will be looking for one // If you can not find 375 you may be able too get 38-55
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I defer to the Lyman book for the warnings on shooting .38-55 in a .375 Win & especially, vice versa due to the differences in case length, bullet & neck diameters along with the fact that the .375 Win brass is more strongly made to handle the 50,000 + psi. operating pressures compared to the 30,000 psi. ceiling of the .38-55.

If you get a .375 Win, use brass bullets and loads intended fer it. Same goes fer the .38-55 to get the best accuracy and safe results with. Don't play mix & match with these chamberings.

Get da book.;)
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I am not going too mix and match .. It just seemed odd too me that a 38-55 would fire from a 375 and not cause something too happen .. we all hear of the 38 being shot in the 357 and the 280 rem being the same as the 7 mm Remington (not the mag ) ,, But I never ever heard of using 38-55 in a 375 Winchester..I already reload for a 257 Roberts A.I. so if I do get a 375 I will be getting the right brass ..
Just have too do more research too see if I am gaining enough over a 30-30
 
Actually Water's fired factory 375 Win through a Win 94 38-55; but not an 'out of the box' and into the carbine scenerio! Ken broke down factory rounds; reduced the powder charge and begin carefully stepping it up til the original factory round was being used.
He didn't do it to prove it should be done, he was concerning about blowing up a 38-55 with 375 ammo. Ken stated that by the time he reached the factory load, the brass was showing "...case head indications in the final steps of each series pointing to the presence of uncomfortably high pressures without the margin of safety I think proper."
The 38-55 held the pressure, so it is dummy proof to a small margin.
Personally; I'm with Whelanlad, I'd run 38-55 at a hotter loading in a 375. But I'll run 38 special at + levels in a 357 magnum too...some folks are not wired the same as Whelanlad and I.
I have been known to (carefully) let the Crayon cross outside of the line when coloring :)
But, hey...stay safe. Don't do anything you are not comfortable with.
 
38-55 brass is much easier to find and will have more capacity due to being lighter.

That said, I have over 200 pieces of 375 brass, bullets are a challenge, cast seems to be much easier to find.
 
If you want to run unusual cartridges...sometimes these things have to be done.
You can run 30-40 Krag in a 303 Br and vise versa. It involved forming and dycking around, not for OCD folks or easy discouraged people. Want to play with odd stuff...got to be flexible to some degree.
A chrono is probably a REALLY good idea if you are going resort to making / using Ad-hoc brass, can tell when it's getting warmish. Might want to read up on pressure signs too.
 
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