#21
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Are you thinking of the 6.5mm Grendel? Then there is this one on the right. This is made with a .30/06 reamer, run in 1.5" for a 1.6" length of case as it is headspaced on the shoulder. .303 brass for a magnum bolt face, or .35 Remington brass for a standard bolt face with Mauser Extractor as both have a .457" head diameter, same as the '06 at 1.5" from the case mouth. I shortened a .30/06 FL sizer die 1" then, then Very lightly lube .303 or .35 Remington brass & run them into the die to bottom the shell holder against it. Trim to the proper length for a .30/06 neck - .441", isn't it? Ballistics are identical to the .30BR in both cases, ie: 2,900fps with 130gr. Hornady SP's. 3,000fps with 110's and 2,425fps with 165 Sierra hunting HP's. I thought it was my idea, but later found out an Aussie did the same thing about the same time. I called mine the .30/03. His was the .30 Pygmy. The round on the left is a standard .30BR.
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Daryl Last edited by Daryl; 06-03-2019 at 03:16 PM. |
#22
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#23
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Guys - sorry for the goose chase. The cartridge was not a Grendel or 6.8SPC or any of the other popular short-action calibers that are in production. Its profile was similar to a 260 Rem (shorter neck than 6.5CM or 6.5x47). The case body diameter was larger than a 223 Rem, but not .308 parent case. It was not a rimmed case...not a Herrett. Some of the appeal was a case with a little more power than a 223AI but not quite stepping up into a .308/6.5 CM size cartridge.
Unfortunately, I can not remember the caliber, but it was somewhere in the .224 - .308 cal. I came across it when I was doing some research on for a 6x45mm build. As I recall the developer of the round had a website that offered dies and even chambered AR barrels. There was one vendor who was source of brass that I believe Starline had done special production run. Any thread related to the cartridge was shooters speculating on when more brass would become available...waiting to spot a unicorn. Sorry - Its like an itch... just out of reach. I can almost just recall it. Last edited by Oso Polaris; 06-03-2019 at 06:32 PM. |
#24
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Good shooting! Gary NRA Endowment Life Member |
#25
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6mm hagar
I figured it out
6mm Hagar Based on 30 Remington Case with a case length longer than a 6.8SPC, which made it a tight fit in an AR15 (magazine length issue). The 220 Thunderbolt as a 6mm Hagar necked down to .224. www.6mmar.com/6mm_HAGAR.php http://bulletin.accurateshooter.com/tag/6mm-hagar/ Last edited by Oso Polaris; 06-03-2019 at 09:25 PM. |
#26
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The 22 Nosler case design screams future failure with the rebated rim, which got me thinking about the Hagar case for your project. Now that I have tracked it down, I realize that it is very close to 6.8SPC so might not be worth the effort then again... "Mamba-Hagar" has a nice ring! |
#27
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The hagar is another series of wildcats, there was also an outfit that did a .400: straight walled case based of the 6.5 caracano case. Having a double stacked cartridge was also high on my want list. MDWS (mad dog weapon systems) has a slurry of AR based wildcats based off a few different cases. |
#28
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So what would you do??? 1963ish H&R factory chambered 22 Jet that is supposed to have a .222 bore came with a nice pile of brass and .222 bullets.
Save the .222s and work up the .224s? Or start looking for more .222s?
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Shoot First... Ask questions later... On Saubier.com __________________ NRA Lifetime Endowment Member |
#29
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Gary did you slug the barrel? I wouldn't think they spent money to have a barrel maker make up .222 barrels. They were, for the most part, a cheap gun.
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#30
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I'd venture to guess it's .223 bore. as long as you have enough neck space you should be fine for .224 bullets
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