Sure you can measure the inside diameter of the end of the tube but 22cm ahead of the standing breech might be a little difficult. Does your gun have the vulgar fractions stamp like (13/1, 12/1, etc)? You might be able to take the stamped/nominal diameter for the tube or an estimate and get an approx. value for the choke.

Email me the pics to the address in my profile and I'll take a gander.

Kind Regards,

Raimey
rse

Last edited by ellenbr; 11/15/08 09:43 AM.