Help Identify oddball caliber in XP- 100 ?

G

gunsmither

Guest
I have a customers XP- 100 in to identify what caliber it is. He inherited it from his uncle. The barrel is stamped - "7-INT Dub 'l Duck" . No, I'm not kidding! Wierdest wildcat I've ever heard of.

Anybody ever heard of this Double Duck 7mm? It's apparently some version of the 7mm International used in Handgun Silouette shooting, based upon the .300 Savage case, but what does the Dub 'l Duck signify? Anybody?

It is also stamped -" Schwahn .015 " . Could this be the gunsmith who did the work ??? The owner has dies for it, marked 7mm International, and some of what looks like newly sized brass, and an IHMSA loading manual for 7mm Int., but the book says nothing about a 2 Ducks version.

Any help would be most appreciated. Thanks! Joe
 
The only info I have on the 7mm Int is the R or Rimmed verson. It was formed from 30 30 brass with a 38 deg shoulder and 2.039 case length. The 7IHMSA was formed from 300 Savage case. As for the duck? I have no idea.
 
suggestion

Joe:
personally, i would make a cerro cast of the chamber and the reloading die. accurately measure them to assure they match.;)
on a wild guess, it is a minute change in the cartridge that the owner thought would give them some sort of advantage in competition.
one sees alot of this in 1000 yd competition. they will take a cartridge like the 6.5-284 win and shorten the cartridge, change shoulder angle, or lengthen neck and want to add their personal name to the new invention. then they will call it the " 6.5 Mr. Wonderfull Whompumall" cartridge. typically just a man with an overinflated ego or a dull sense of humor! :eek:
just an opinionated old farts .02 Greg
 
Oddball silhouette cartridge?

If it is a standard full length 7mm International die, about the only thing you can do to the case hardened die is shorten it. I would suspect someone ran the reamer in short to get some magical ballistic performance and shortened the die a corresponding amount. Heaven forbid they would stamp the barrel with something useful like 7mm International -.050".
 
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Could be this guy? However it is a long way from Washington state .

Russell Schwahn
R S Guns
123 White Street
Martin, TN 38237
http://rsguns38237.tripod.com/

phone: 731-588-2501
fax: 731-588-2501
 
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Thanks to all!

Thanks for all your help fellows, and especially to J. Valentine for the Schwahn Guns tip. I'll give that fellow a call just for grins, but he doesn't mention rebarrelling or gunsmithing on his website.

I plan to do a chamber cast of the chamber and sizing die, but I've too many irons in the fire right now, and the owner is in no hurry.

Happy Holidays to all! Joe
 
You are welcome , He may be a relative off the person who built the gun .
 
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