02-24-2011, 09:19 AM
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Beartooth Regular
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Join Date: Aug 2003
Location: west central Illinois
Posts: 211
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Well, the 400 Whelen is misunderstood, especially with regards to headspace issues.
The original Whelen was done with a .458-.460 shoulder dimension and not the .441 of the standard '06. A few folks tried to duplicate it as a .400-06 and had headspace issues with the small shoulder.
Small headspace area are not an issue depending on what you headspace on. There are numerous guns that headspace on a few thousandths of an inch and fire thousands of rounds without a hitch. In fact, they will do that in a minute. One that comes to mind immediately was a 1927 version of the Thompson. Here is a "big bore' that fires a half ounce projectile and hundreds of rounds per minute headspacing only on the few thousandts of case mouth.
The 411 Hawk is a slightly shorter case and duplicates the 400. Eliminating the need for a bit over length 06 to form correctly as they get short. Basic 06 brass is hard to come by to get the correct neck length.
I would suggest that anyone look up Michael Petrov's article on the 400 (with permission from moderators) at Fred Zeglin's site z-hat.com)
I think this will identify where the headspace problems came from and define the cartridge as it should be. A great old round.
Todd
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