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OP
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Got a bubba 1891, 7.65x53 reamer, and a 1:10 twist .358" 20" barrel blank laying around, and the brain is contemplating throwing the two together. The 9x57 rounds I have on hand have too long an OAL for me to lean towards doing such a cartridge, and the other big candidate I considered, 35 Remington, iirc requires significant magazine work to feed correctly. Debating necking up the 7.65 to make a 9mmx52 or so cartridge, and just using a different pilot bushing on my reamer along with finding a throat reamer for the .358 bore. The main concern is have there is possibly insufficient neck length by expanding to a .358" projectile. Are there any better cartridges Im forgetting about or am I overthinking things? Would the proposed wildcat have any drawbacks I haven't thought about?
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a "low pressure only" 358 WCF? it seems like I remember a Belgian/Danish cartridge listed that was pretty much a 35- well probably more 9.5 caliber based on the 7.65x53 case for the Belgian 1890 actions, so it's been done before
Last edited by desertshooter; 06/19/23.
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Old Corps
Semper Fi
FJB
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OP
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I have, however the 9x57 I have on hand does not fit the magazine. Worried the heavier bullets that the 1:10 twist will need won't be able to be loaded to a short enough OAL for that to fit the magazine without decent protrusion into the case body from the projo
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If the 9x57 cartridges fit into the magazine and feed, then you should be good to go.
1:10 is fast for a 0.358" bore. Most factories use 1:16, but most customs are 1:12 or 1:14. Light and heavy bullets both work fine with a fast twist.
The rule of thumb is that a slow twist is the opposite: light bullets shoot well but heavy bullets don't. But even that is subject to the rules that specific rifles impose on us. My Ruger 77 with a 1:16 twist shot 250s well at speeds above 2,550 fps.
Okie John
If Montana had a standing army, a 270 Win with Federal Blue Box 130's would be the standard issue.
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358 Win. That'll be short enough to fit the magazine.
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358 Win. That'll be short enough to fit the magazine. This is the answer.
Old Corps
Semper Fi
FJB
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358 Win. That'll be short enough to fit the magazine. This is the answer. And with the single stack magazine, feed issues will be minimized.
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Campfire Outfitter
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In an 1891 action I wouldnt go any larger than a 35 REM
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In an 1891 action I wouldnt go any larger than a 35 REM You don't have to load a .358 to full pressure loads. For that matter, if the OP makes his 9x53 wildcat, what data does he have to ensure working within 7,65x53 pressure?
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358 Win. That'll be short enough to fit the magazine. This is the answer. And with the single stack magazine, feed issues will be minimized. I just tried a few 308 rounds thru mine, looks like feeding would be almost a non issue.
Old Corps
Semper Fi
FJB
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OP
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In an 1891 action I wouldnt go any larger than a 35 REM You don't have to load a .358 to full pressure loads. For that matter, if the OP makes his 9x53 wildcat, what data does he have to ensure working within 7,65x53 pressure? That's a great question, and I think I could use 358 starting loads as a good beginning. However, Ive also got the Gordon's Reloading Tool available to me to determine if I can get better approximate load data as well
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