Need a measurement please.

[D Humbarger]

I was at a Cabelas this weekend & got a chance to compare the standard 12 gauge handi to a Ultra 12 gauge.  The Ultra barrel was clearly a larger OD at the breach than the standard but I did not have my dail calipers in my pocket to take a measurement  .  Can someone with a Ultra 12 gauge measure the OD over the chamber please.

[quickdtoo]

1.2XX".

Tim

[bobg]

As usual Tim is right. . That is what mine measures.
                     bobg

[D Humbarger]

Thanks guys & It was on a SB2 frame.

[quickdtoo]

An SB2 shotgun frame, not to be confused with an SB2 rifle frame. 

Tim

[D Humbarger]

wazzz the difference besides the larger firing pin hole?  Can the 12 gauge Ultra barrel be fittid to the SB2 rifle frame?

[quickdtoo]

The opening for the chamber swell is larger on the SB2 shotgun frame, a standard barrel can be fitted to it, but the underlug must be bedded to fit good.

Tim

[quickdtoo]

I couldn't think of his name, but it finally came to me, peternap bedded a 30-06 barrel in an SB2 shotgun frame.

Tim

http://www.gboreloaded.com/forums/index.php/topic,186286.msg1098920051.html#msg1098920051

[D Humbarger]

Tom what I am getting at is that I turned a length of steel to a OD of 1.200 & it fit into a SB2 rifle frame perfectly with no gaps anywhere. No side play because there was not a gap on the sides. Thats why I want to use a 12g ultra barrel as a stub for a project.  The better fit of the ultra barrel stub has to inhance the accuracy of any stub conversion

[quickdtoo]

wazzz the difference besides the larger firing pin hole?  Can the 12 gauge Ultra barrel be fittid to the SB2 rifle frame?

Guess, I didn't answer the question asked!!  No, the chamber swell is too big.

Tom what I am getting at is that I turned a length of steel to a OD of 1.200 & it fit into a SB2 rifle frame perfectly with no gaps anywhere. No side play because there was not a gap on the sides. Thats why I want to use a 12g ultra barrel as a stub for a project.  The better fit of the ultra barrel stub has to inhance the accuracy of any stub conversion

No better than a 1.1XX" barrel in an SB2 rifle frame, and there's no worry about the firing pin size or the USH barrel being 1137 instead of 4140. Whether that's an issue with a high pressure chambering I don't know for sure, but I know a rifle donor barrel stub works fine on the 6.5x55 at 60kspi. 

Tim