Threading Shotgun Barrels

guncrank - I did another 12 gauge bbl forcing cone today and it turned out great. I then tried to do a 20 gauge forcing cone and the reamer only polished the barrel. It hardly did a thing. I borrowed a rearmer from a student who bought his own.

BTW, we were taught today to do chokes. I'm going to order a choke from Brownell's before I try it on a shotgun.

Just wait until you get a chrome lined barrel to do.

Good to hear your learning about chokes at school.

Funny story
There was a big 3rd year student who could do a choke tube installation in 30 minutes.
It would take me almost a hour.
He had arms like a football player.
That reamer would smoke ( lube was Do-Drill)from him turning it so fast.
 
Dixie you must be old.
Click to expand...

Not that old, I just got into all this when I was very young (30+ years back, around 1980, and me around 16). I did start before the screw-in choke craze though. Back then, it was still Lyman, Polychoke, and Simmons.
 
I am two years older.

Remember all the external chokes

Couple of days ago I got another shotgun in for choke tubes.
Sure hope I still have a couple of thin wall tubes left.
 
Hey guys!

I'm hung up on a decision about backboring and I need some creative input.*

The Daly is thirty plus years old and it was designed as a field gun. So, I decided to compare the Daly pattern to the Citori pattern. I put the full chokes in the Citori and patterned it side by side with the Daley using identical trap loads and I really can't see any difference.

I've read a little about backboring but I'm not sure I'm sold on it. I know it's supposed to give you a greater pattern density but I'm wondering if that's rooted in hype or in reality.
 
The idea is to increase the bore diameter to get a bigger construction in the choke.

The theroy is that the bigger diameter allows the shot to spread out more in the wad so to reduce shot stringing .

Ralph Walker book Shotgun Gun Smithing has a good explation
 
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