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Old 05-04-2010, 02:24 AM
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I'm building a 375/284 on a Brno 601. With a Woodleigh 235PP it just fits in the mag, Barrel is 22", 1-16 twist. I'm predicting 2600fps. Has anyone else here had a go at this feral puss
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Old 05-05-2010, 10:12 PM
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What are you trying to do?

Given that the 284 case has about the same capacity as the 30-06 family, then what are you trying to do with it? Better yet, where did you get the custom twist barrel?? How long is your magazine box? All in all, this could be about like a 350 Rem. Mag., but with a 25% slower twist, that limits your bullet weights. I understand the Express concept, but what if your bullets don't open up in game? So how would a 375 H&H perform with your bullets, if it had a muzzle velocity of 2000 fps. using a (1 in 12" std. twist)?? Are you making a rebated rimless 375 Win., or a goosed up 375/356 BB?? Those bullets are flat pointed for the tube magazines. It would be a real kick in the pants above a Win 94BB 375. Maybe you could call it the "Thirty Eight- Eighty Four, Down Easterner". Bruins and Bullwinkles, look out! But for me, I've already pulled too many rims off of 284 cases, in my RCBS 25-284 Form Trim die. It's a neat case, but I always hoped for a full diameter rim. Same dies, but just a different shellholder. The new RCM cases are pretty close to this solution, but would take different dies. So please get back later on with some field results.
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Old 06-08-2010, 07:54 AM
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Location: Mississippi Gulf Coast
Posts: 703
.375 Wildcats

Originally Posted by Treadlightly View Post
I'm building a 375/284 on a Brno 601. With a Woodleigh 235PP it just fits in the mag, Barrel is 22", 1-16 twist. I'm predicting 2600fps. Has anyone else here had a go at this feral puss

Go to www.ammoguide.com . There you will find several .375 wildcats. I developed one that I named, for the lack of a better one, the .376 Steyr Short. It is the .376 Steyr case shortened .330" in order for it to cycle in a re-chambered Marlin M375. It preceded the new .338 Marlin Express about three years which is also based on a modified .376 Steyr case.

Try these:

.376 Steyr Short: www.ammoguide.com/?catid=328 .

.375/284 Winchester: www.ammoguide.com/?catid=429 .

.375/444 Marlin, 375 JDJ, 375 Bellm: www.ammoguide.com/?catid=324 .

Your action is probably long enough to go with the factory .376 Steyr and not have all of the disadvantages of a wildcat.

Garand Collectors Assoc.
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SASS #36461

Last edited by NITRO; 06-09-2010 at 08:57 PM. Reason: Corrected spelling: from "375 Blem" to "375 Bellm". Sorry Mike.
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Old 06-08-2010, 02:54 PM
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Join Date: Dec 2005
Location: Texas
Posts: 303

The 1972 edition of Handloaders Digest had an article on a 19" Savage 99 chambered to .375/.284. The author obtained 2550 fps with a Speer 235 and 2350 fps with a Hornady 270. If his loads were anywhere near safe, you should be able to come real close to 2600 fps.

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