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Discussion Starter #1
I really want a Handi in .375 Winchester, but there is no chance of finding one. Can you safely fire .375 Winchester cartridges in the .38-55 BC barrel? Are the bore diameters the same? I know the .375 is slightly shorter, but how much?
 

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Discussion Starter #3
Tim,

I wonder if that is based more on the fact that a lot of guns chambered in the .38-55 won't handle .375 chamber pressures. I know the Handi will handle even the hottest .375 Winchester loads, but I just don't know about shooting them in the .38-55 chamber.

I've been looking for a schematic on the .38-55 case, but haven't found one yet. If I can find one, it should be able to answer my question.
 

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The main concern about firing a 375 Winchester round in a 38-55 chambered firearm is the pressure. Chambering a 375 round in the 38-55 would be easy but unwise in an older firearm. I cannot advocate the practice of mixing the two rounds but I know what I'd do. :D
 

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I interchange 38-55 and 375 Win brass regulary in my Win 94 375 BB. It was chambered for the 375 Win.

My 38-55 loads actually exceed the 375 loads in velocity. But I check my loads VERY carefully and SLOWLY work up to those levels. I get an avg. of 2130fps with 250gr bullets from a 20" barrel. Kicks like my 30-06 Savage.

The 375, pressure wise, is the same as a 308 Win, and 30-06. All go to 52K CUP, which according to SOME formulae is about 62,000 PSI.

If I had a 38-55, I'd just use 38-55 brass and load it to whatever levels I felt comfortable with. The Handi can easily handle the 375 pressures.

I'd think accuracy might be worse with the shorter 375 brass, unless you loaded long to compensate.
 

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Discussion Starter #7
Well, the more I check in to it, its seems it would be a lot easier to simply stick with the .38-55 cartridge. It can be loaded just as hot as the .375, and brass seems to be a little easier to find.

Anyone know what bore diameter H&R is using in the Target?
 

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Jason, the short answer is yes, the Handi will easily handle 375 pressures. The 375 Win operates at 52,000 psi with a case body diameter at the head that is smaller than the 30-06 which operates at the same practical pressures. I've fired quite a bit of 375 Win level loads in mine, no trouble. There is a slight mismatch of chamber dimensions to bore dimensions, and the bore is sized to the older 38-55 size of 379-380 on the groove diameter while the 375 Win is a true 375-376 on the groove diameter.

While a few are experiimenting with jacketed bullets in the Handi, I believe you can do as well with lead. The twist handles the Lyman 264 grainer (379449) quite well and pushes it at 1800 fps comfortably. I believe more is attainable, just don't have a chrono at present to be able to figure it out.

The main problem with the Handi and the 375 is not pressure but bore size. A couple of folks are making a 379 jacketed bullet, but makers like Speer, Hornady, Sierra are making a 375 bullet and it tends ot tumble in the .004" larger Handi barrel.

Do a search, cheatermk2 has done a bit of experimenting on this line with the Winchester bullet (no longer a component production item) there has been a good bit of disscussion on this subject over the last several months.

I don't think you can go wrong with even a 250-270 grain lead bullet at 1700-1800 fps. Such loads have worked for close range work on deer and black bear and hogs for longer than we've been walking around, at it's worst the 38-55 is the ballistic twin of a 44 Mag rifle, with a better bullet.
 

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OOOOOOOH, We must not type these words of damage, the Moderator police might get us. See Ruger firearms 30 Blackhawk!!!!!!
 
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