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Double Rifles, Single Shots & Combinations >> Single Shots & Combination Guns

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DonT
.224 member

Reged: 16/05/12
Posts: 33
Loc: Minnesota

Johann Peterlongo Drilling- Mystery Caliber!
#230568 - 27/05/13 11:06 PM

Good Day,

Recently acquired a drilling I am having problems identifying the rifle caliber.
It is an Austrian Drilling marked Johann Perterlongo on one shotgun barrel and Tiroler Waffenfabrik on the other. It has the following letters under Crowns in various areas on the barrels S, U, W, G, N There is also 0/55g G.B.P over a line and under the line is STMG. The shotgun barrels have a 16 in a circle and 16/1, they are both also stamped Nitro. The shotguns chambers are definately 2.5" (65mm) and choked Full and Full+. It is an internal hammer gun, dual triggers and the front trigger is a set trigger.

The gentleman I got it from has been shooting the gun with modified 32-20 & 25-20 rounds. They are necked down to 25 Caliber (6.5mm) using a 25-20 die. I slugged the bore and it is fact a .257" groove diameter. He has also used 25-20 shells as well. When first fired it moves the shoulder ahead on the 25-20 rounds to fire form the brass.

I did a chamber cast and it appears the dimensions are as follows:
Rim: .425
Case diameter right above the rim: .348
From base to the shoulder: 1.058
Diamerter at the shoulder: .348
The neck above the shoulder is .300 and tapers to .282 and is about .350 long.
Overall Cartridge length is about 1.46 inch

I realize the 25-20 and the 32-20 cases are about .25" short but they seem to work fine and I am getting decent groups using a 75 grain Hornady Jacketed bullet with 7 - 7.5 grains of Alliant 2400 powder.

With taper of the neck I am thinking this may be a long throat but it is hard to tell. I have pored over all my cartrige of the World books and Donnelly's cartridge conversion book for obsolete cartridges and nothing.

Any thoughts on what it might be and the best parent brass and dies to use. Like I said it is shooting OK with what I am using so far just thought I would see if anyone had any thoughts on what it is??

Thanks in advance for any help you can render..

Sincerely,
DonT

Edited by DonT (27/05/13 11:07 PM)

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Igorrock
.400 member

Reged: 01/03/07
Posts: 1641
Loc: Finland

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: DonT]
#230569 - 27/05/13 11:29 PM

Maybe 6,5x40R...?

http://www.tiropratico.com/ammunition/pagine/65x40.html

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http://promaakari.wordpress.com/

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DarylS
.700 member

Reged: 10/08/05
Posts: 26516
Loc: Beautiful British Columbia, Ca...

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: Igorrock]
#230571 - 28/05/13 12:08 AM

This ctg. not a 6.5 - but a .257, according to the measurements. A 6.5 in Euro designation, would have a .256" or .257" bore, and a .264" to .266" groove diameter.

Were there not some obscure/different "Peterlongo Cartridges", which were proprietary rounds, not normally chambered by anyone else? This one seems to fit that premise.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Igorrock
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Reged: 01/03/07
Posts: 1641
Loc: Finland

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: DarylS]
#230578 - 28/05/13 01:39 AM

Cartridges of the World tells that 6,5x40Rmm has .250" bullet.

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http://promaakari.wordpress.com/

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DonT
.224 member

Reged: 16/05/12
Posts: 33
Loc: Minnesota

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: Igorrock]
#230586 - 28/05/13 04:22 AM

Thanks for the input please keep it coming.

It is definately not a 6.5X40R as the one for this rifle is definately a bottleneck cartridge as compared to the tapered (relatively straight wall case) case like the 6.5X40R...

If Johann Peterlongo used proprietory rounds is there somewhere that shows the calibers they chambered rifles in????

Thanks,
DonT

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fuhrmann
.333 member

Reged: 04/01/05
Posts: 326
Loc: Switzerland

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: Igorrock]
#230587 - 28/05/13 04:24 AM

Igorrock,

I checked my copy of COTW (9th edition) - 6,5x40R is listed, but I see no mention of bullet diameter .

Daryl,

Europe never was that exact - not even Germany alone...!
"Caliber 6.5 mm" might be even more of a mess than "caliber 8 mm"
E.g. the .25-35 Win is called 6.5x52R over here .

Regards,
fuhrmann

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500Nitro
.450 member

Reged: 06/01/03
Posts: 7244
Loc: Victoria, Australia

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: fuhrmann]
#230588 - 28/05/13 04:32 AM

""Caliber 6.5 mm" might be even more of a
mess than "caliber 8 mm""

I like that. It is so true.

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Igorrock
.400 member

Reged: 01/03/07
Posts: 1641
Loc: Finland

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: 500Nitro]
#230589 - 28/05/13 06:06 AM

Quote:

6,5x40R is listed, but I see no mention of bullet diameter

I have 7th edition. In the end of chapter "European sporting rifle cartridges" there is a chart named "Dimensional data" where you can see exact acquirements of all cartridges.

Perhaps this: 6,5x41R i.e. .25-20 single shot

Edited by CptCurl (31/05/13 08:36 PM)

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AkMike
.416 member

Reged: 19/11/05
Posts: 2576
Loc: Anchorage, Alaska

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: Igorrock]
#230593 - 28/05/13 09:12 AM

Spend some time looking thru

http://www.municion.org/

It's in Spanish so you'll need to turn the translator on to understand very much. It's pretty good overall.

This is also a good one. To find pistols or regular sizes ect look at the links on the bottom of the page.

http://members.shaw.ca/cstein0/metric.htm

http://members.shaw.ca/cstein0/riflelist1.htm

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DarylS
.700 member

Reged: 10/08/05
Posts: 26516
Loc: Beautiful British Columbia, Ca...

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: AkMike]
#230595 - 28/05/13 09:37 AM

TKS for the 6.5 clarification, guys. Of course, the obsolete .25/20 single shot is not same as the "current" but also obsolete Winchester .25/20 round - of course.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Igorrock
.400 member

Reged: 01/03/07
Posts: 1641
Loc: Finland

Re: Johann Peterlongo Drilling- Mystery Caliber! [Re: DarylS]
#230617 - 28/05/13 02:09 PM

This 6,5x41R i.e. .25-20 single shot is not so really uncommon in germany, as some remembers I found this some months ago:

http://forums.nitroexpress.com/showflat.php?Cat=0&Number=225958&an=0&page=1#Post225958

HEYM heerenbüchse in .25-20 SS

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http://promaakari.wordpress.com/

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DonT
.224 member

Reged: 16/05/12
Posts: 33
Loc: Minnesota

Re: Johann Peterlongo Drilling- Mystery Caliber! Pics Added [Re: DonT]
#230715 - 31/05/13 12:41 PM

Here are some pics, not sure if this will help or not.......
Thanks,
DonT

Pics:

Edited by CptCurl (31/05/13 08:36 PM)

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