| lancaster |
| (.470 member) |
| 16/10/14 01:52 PM |
Re: I need help determining mfg date - C.G.HAENEL 10.75x68
|
Quote:
Hello lanchaster,
Do you have such a Haenel M1900 rifle in 10.75x68 caliber? Have you done a chamber cast that shows a freebore? Otherwise, this is just your opinion, is it not?
no, not my opinion
please see the CIP measurments for the 10,75x68 which are coming from the old german factory standards:
http://www.cip-bobp.org/homologation/uploads/tdcc/tab-i/tabical-en-page74.pdf
on the right side under "Chamber Mini" in the section "Commencement of Rifling" the free bore starts with 10,82mm and ends after 30 mm at 10,45mm/10,75mm lands/groove diameter.
and this is the minimum