Need some help with ID of smoothbore

[OldRust]

Mr. Doughty,

I pulled the hammer screw out of my 10mm twin and measured it.
It is a M3 x 6 x 0.50 Pitch. You can get one at your Ace Hardware for about a quarter. Pick up a flat washer to fit it and your hammer will stay on until you can find a screw with a larger head or re-tap it.

Thanks
O.R.

 

[Treestalker]

I had one marked 9mm, which is a popular bore size in Europe. This same gun was also made in 28 guage; if yours is smaller than .410, it's a 9mm and won't take enough powder to sneeze at. Mine had a swollen breech when I got it, so I cut and re breeched it. Please be sure of your bore size before you load it; Spanish proof is only about 10,500 lbs sq/in. It will be marked '700kg/cm2' or some such.

 

[OldRust]

@Treestalker makes some very good points. Be sure of the bore size and load IF or when you decide to shoot it. Just because it looks to be the twin to my 10mm doesn't mean it is a 10mm. I actually second guessed myself and double checked mine.

This is just my hobby and my way but I try hard to make it a safe one. With the old ones that look promising to be a shooter I'll pull the breech plug and inspect closely. Determine what test load that I will use and take it to the range, strap it to a tire and fire with a string then reinspect. For a long time I had lunchtime access to a Magnaflux booth. That was helpful. I guess the standard legalese line is to have it checked by your gunsmith

Also I don't believe any of us mentioned to be sure it is unloaded. There are lots of horror stories to hear about that.

Thanks
O.R.

 

[Doughty]

OldRust,
Thanks for the info. Gotter did.