What does this choke # mean on A5?

[xmanpike]

I have a 1931 12ga Browning A5 and was cleaning it and noticed that there was a choke number on the underside of the barrel. It says CHOKE 18.3

Can anybody tell me what this means? Is this equivalent to imp, mod, full?

I have been using this gun for dove hunting and I do pretty well, but am thinking about another gun. Thanks

MC

 

[TexasRifleman]

18.3 is the bore size in mm of that choke.

If I remember right 18.3 is about a "full" but I can't find a chart. I've seen charts that show the equivalent choke names but I can't remember where.

 

[xmanpike]

I looked for charts online, but they were all vague and dependent on some other variables. Does anyone know if this is going to be equivalent to full, mod, or imp?

 

[rbernie]

18.3mm is approximately .7205".

Assuming that .729/.730 equals cylinder bore, that barrel would be choked improved cylinder (bore minus ten points).

 

[orphanedcowboy]

look for these markings on the left side of the barrel:

BROWNING CHOKES AND THEIR CODES (ON REAR LEFT-SIDE OF BARREL)

* designates full choke (F).

*- designates improved modified choke (IM).

** designates modified choke (M).

**- designates improved cylinder choke (IC).

**$ designates skeet (SK).

*** designates cylinder bore (CYL).

 

[xmanpike]

I dont see any of those markings on the side of my barrel. There is a star at one point but it has an H next to it.