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choke marking #531283 12/16/18 08:55 AM
Joined: May 2011 Posts: 1,071 Canada gunsaholic OP Sidelock
OP gunsaholic Sidelock Joined: May 2011 Posts: 1,071 Canada	When you see a Belgian gun with the marking 18.3choke18.2 (written just like that) are both numbers just giving a range of what the bore measurement could be? Both barrels are marked the same. I have ben told that the 18.2 is likely choke dimensions but that is not the case when measuring the muzzles with a caliper. They are much tighter than the 18.2. Last edited by gunsaholic; 12/16/18 08:58 AM.

Re: choke marking gunsaholic #531290 12/16/18 09:27 AM
Joined: Dec 2001 Posts: 12,743 Lynchburg TN 2-piper Sidelock
2-piper Sidelock Joined: Dec 2001 Posts: 12,743 Lynchburg TN	Has been a while since I looked up Belgian proof marks, but as I recall the 18.3 & 18.2 are bore diameters. Most likely taken before & after final polishing. Thus at final proof, it would have had the 18.3 (.720") bores. The word choke as I recall means that barrel has at least, but not limited to, 0.2 mm (.008") of choke. The choke should now read 18.1 mm (.712") or smaller Miller/TN I Didn't Say Everything I Said, Yogi Berra

Re: choke marking gunsaholic #531312 12/16/18 11:47 AM
Joined: May 2011 Posts: 1,071 Canada gunsaholic OP Sidelock
OP gunsaholic Sidelock Joined: May 2011 Posts: 1,071 Canada	Thanks. That does clear it up.

Re: choke marking gunsaholic #531320 12/16/18 02:35 PM
Joined: Jan 2006 Posts: 9,799 Likes: 479 AZ but dreaming of KS Drew Hause Sidelock
Drew Hause Sidelock Joined: Jan 2006 Posts: 9,799 Likes: 479 AZ but dreaming of KS	Depends on DOM After 1810 bore @ 22cm was stamped in .2 mm gradations; after 1894 .1 mm gradations 1878-1897 choke constriction > .08 was stamped "non pour balle" After 1924, only "CHOKE" and bore in mm https://sites.google.com/a/damascusknowledge.com/www/home

Re: choke marking Drew Hause #531354 12/16/18 07:56 PM
Joined: Aug 2007 Posts: 12,180 Likes: 434 North Alabama ellenbr Sidelock
ellenbr Sidelock Joined: Aug 2007 Posts: 12,180 Likes: 434 North Alabama	Originally Posted By: Drew Hause ......... .08 was stamped "non pour balle" Drew: Wouldn't that be 0.008" or 0,2mm? Cheers, Raimey rse

Re: choke marking gunsaholic #531537 12/18/18 05:32 PM
Joined: Jan 2006 Posts: 9,799 Likes: 479 AZ but dreaming of KS Drew Hause Sidelock
Drew Hause Sidelock Joined: Jan 2006 Posts: 9,799 Likes: 479 AZ but dreaming of KS	Sorry for the delay in responding and Raimey is of course correct. This might also help...or not Banc D'Epreuves Des Armes a Feu De Liege (Proof House for Firearms of Liege) used 3 proof tests https://books.google.com/books?id=5fxGAQAAMAAJ&pg=PA52 First Obligatory Proof Load for �Double-Barreled Breech-Loading Sporting Guns� - 12g breech plugged (rough forged) tubes Second Obligatory Proof - 12g joined barrels, fine bored and finished Third Obligatory (Definitive) Proof for double breech loading sporting weapons; finished barrels attached to finished action Marks applied in 1906 https://books.google.com/books?id=5fxGAQAAMAAJ&pg=PA59 The bore and choke marks were placed with the First Obligatory Proof https://books.google.com/books?id=5fxGAQAAMAAJ&pg=PA53 It is not uncommon to see 2 bore marks, and .1 mm = .004" difference was allowed for the Second Obligatory Proof, and the barrels remarked. The fourth "Optional test with smokeless powder" was offered starting in 1891, but was not mandatory for shotguns until after 1924. https://sites.google.com/a/damascusknowledge.com/www/home

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