Smallest RF bore size?

[nvreloader]

Guys

What is the smallest bore size, you have found in a 22 caliber RF bbl, that you have measured?

Tia,
Don

[Nobade]

For commonly available rifles, CZ is the tightest.

[uscra112]

I assume you mean BORE, as in tops of the lands? I remember having gauged one at .2135, using pin gauges. Ought to remember what gun it came from, but I don't at the moment. I have a pile of takeoff barrels that I use for rebarreling old single shot boys' rifles. It was one of those.

[nvreloader]

uscra112

Thank you for that info,
IF you can find which brand name the bbl was, I would greatly appreciate that info,
I have a project I am working on and want the smallest bore size (top of the lands) for use with 22 cal pellets etc.

I have a wild itch I need to scratch, LOL

Tia,
Don

[Nobade]

That's about where most CZ 452 and 455 barrels pin out to also. They have exceptionally deep grooves.

[shutinlead]

The smallest mass produced bore diameter barrel I've ever run across I made a plug for it and used my Sheffield air gage on it - measured a consistent .2141 from an inch in front of the chamber to within a half in of the muzzle came off a model "B" Mossberg with a damaged action. The first inch was about .0004 larger and the last half inch was .0003 larger. I left it alone and fit it to a Remington action that I don't recall, it shoots exceptionally well for the guy.
The smallest non-mass produced is a barrel I got from Gene Rumfelt when he was making barrels, it gages around .213 if I remember right, I have it on one of MOA's stainless 10-22 actions back when Richard was making them and it shoots better than most.
Greg

[KCSO]

I have some Kolibri in 4 mm. They were for a little German derringer.