11.15x65R LK Express Question

This my be a dumb question but what does the LK stand for in this cartridge?

From “European Sporting Cartridges” by W.B. Dixon, “It is speculated that the LK stands for LanKaster (Lancaster being German for Shotgun)…”
Did you see the LK on a headstamp? (Known on B.STAHL).


Thanks Dan
It was not on a head stamp but in a heading for a cartridge on the AECC web site.

11.15x65 R LK Express/ 11.15x65 R Schutzen / 11.15x65 Express / 11.15x65 R Schutzen (Lancaster) / 11x65 / RWS M233 / Egestorff 12065 / SAA 8415 / ECRA-ECDV 11 065 CBC 030

Wait… what?


Hi tennsats,
The speculation is from “the similarity between this (LK) case and the 36 gauge Lancaster has been noted…”
It was before my time. Maybe Brad will explain it better!

At the time of writing that book. regarding the “LK” title, I just repeated what others had speculated and the issue even today isn’t 100% confirmed (just like "R.P. and even “MB” is still not 100% certain). However there seems little doubt that the “L” part refers to “Lancaster” .

My current notes on “LK Express” state:

The 11.15mm “L.K.” cases for Express rifle all utilise different lengths of the same case type having a flat and relatively thin rim. It is believed that “L.K.” stands for “Lancaster Kugel” - meaning a metallic shotshell case loaded with a lead bullet.

The similarity between this case type and the 36 gauge Lancaster brass shotshell case is unavoidable and it appears that the LK series originated from the 52mm Lancaster case being loaded with lead bullets. Egestorff gives the same case # for both the Lancaster and the later 11.1x52R “Drilling Hülsen” (LK type) with the Lancaster also listed as “auch Drillingshülse” (see EXP43) both having practically the same case dimensions. Lorenz case #89 36g for Lancaster is very similar to the 11.15x52R and Lorenz case #312 appears to be the 11.15x40R LK. Apparently commencing c1890 Utendoerffer introduced a complete range of these 40-65mm case lengths.

These have been described for use in a wide range of weapons ranging from Sauer Single Shot Bolt Action rifles, to Sauer “Drillings” (three-barreled weapons : side by side shotgun with rifle barrel underneath).

These cases have also been referred to as “St.” type in Stahl catalogs. It appears that the Stahl LK case type has a different case profile which may imply that Stahl believes these to be Stahl types and introduced by them or that there is a different case type produced by Stahl.

All case lengths could probably be chambered in the same rifle. Utendoerffer catalogs give the base as 11.85mm, Stahl as 11.9mm or 12mm and Egestorff as 11.95 with rims 13.0-13.1mm. They generally all use plain lead bullets although pp bullets are known but may be reloads.

Only produced in Germany, the commoner of the series were manufactured by most ammunition companies and Geco listed the 52mm and 65mm cases till WW2 but no manufacture after WW2 is known.

Here is a specimen made by GECO the 65 mm issue
SherrylIMG_0248 IMG_0249

That’s a nice headstamp Sherryl.

Please note that GECO and GECADO are not the same company:

GECO is the tradename used by Gustav Genschow c1919 (registered in 1922).

GECADO is the tradename used by G.C.DORNHEIM registered in 1908.

Confusing these two is a common mistake - Cornell publications continue to mix them together despite being told several times many years ago.

Thanks for the clarification,about GECO the things one learns on this site
is at times flooring thanks again

Thanks to everyone for the help understanding this cartridge.