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Search: Posts Made By: kurtz
Forum: The .257 Cartridge Rifles and uses 10-14-2008, 11:20 PM
Replies: 6
Views: 4,408
Posted By kurtz
Hi Jon, I tried about ten different powders...

Hi Jon,

I tried about ten different powders and the pressure indicators ranged from none to destroyed brass, nothing too un-expected, the bad end was ejector and extractor gouges if I got too...
Forum: The .257 Cartridge Rifles and uses 10-13-2008, 12:05 AM
Replies: 6
Views: 4,408
Posted By kurtz
Range results: Load Data: (standard...

Range results:

Load Data: (standard disclaimer as with any wild-cat, use at own risk and work up slow)

.25x40mm 16" 1:10 carbine length gas system, fire-formed brass...worked up several loads...
Forum: The .257 Cartridge Rifles and uses 10-05-2008, 11:24 PM
Replies: 6
Views: 4,408
Posted By kurtz
.25x40mm Range Results 505 Load Data:...

.25x40mm Range Results

505

Load Data: (standard disclaimer as with any wild-cat, use at own risk and work up slow)

.25x40mm 16" 1:10 carbine length gas system, fire-formed brass...worked up...
Forum: The .257 Cartridge Rifles and uses 09-21-2008, 01:07 AM
Replies: 6
Views: 4,408
Posted By kurtz
no problem...... L to R....300 Whisper,...

no problem......

L to R....300 Whisper, 7.62x40mm, .25x40mm, .223

497
Forum: The .257 Cartridge Rifles and uses 09-20-2008, 08:19 PM
Replies: 6
Views: 4,408
Posted By kurtz
.25x40mm AR-15 .257 Wild-Cat

Had a couple people ask that I post some info on a .257 wild-cat that I've been working on...kinda like a shortened .25 copperhead for use in a AR-15 with 100gr bullets...

the .25x40mm (AKA:...
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