| 3DogMike |
| (.400 member) |
| 25/05/22 12:45 PM |
|
Re: 1936 vintage Rigby in .275HV
|
Quote:
…..(snip)... But to the barrel: Would a 1930s British barrelmaker have marked his barrel with metric numbers for bore diameter, groove diameter and twist length?
kuduae,
I'm confused, & admit that I'm no whiz on German proof marks.
Could you enlighten me as to where you get German stamped metric bore, groove, and twist from (I presume) the stamped numbers 67288 on the barrel?
Typical 7mm metric BORE proof was ~6.98mm (.275"), and usual 7x57 twist in metric would be 220mm?
The stamped 7m/m 2.24" on the barrel (7m/m cartridge 2.24" case length) is certainly the British 1925 Rules of Proof required proof mark for a 7x57 chambering and stamped right along with the other London View and Definitive proof marks.
Please clear this up to educate me so as to clear my confusion on this point.
- Mike