Barrel not quite fitting

[The Cod Father]

I have done a search without any result so I am going right to the source. I am building a 1911 on a Dlask frame and slide . I was doing a final fitting of parts tonight and noticed that the slide won't go fully into battery.There is still about a 32nd of an inch or less of the barrel still ahead of the bushing when it goes fully forward . It seems just enough to not let the hammer drop and I don't seem to force the slide far enough forward . I was thing that the bushing may need a final bit of lapping as the barrrel has a slight flair at the bushing area ,however after some time with lapping compound everything is smooth and fitting but it still won't go into full battery .
If anyone has an idea I would appreciate it as I'm supposed to shoot this Saturday.

Thanks
TCF

[Hawkmoon]

How's the fit between the slide and the back end of the barrel hood?

[The Cod Father]

Tight and flush .There is absolutly no gap there at all

[Hawkmoon]

There should be a minimal clearance. Are you certain you don't have an "interference fit"?

[The Cod Father]

O.K. I'll bite what is an "interference fit"?

[Hawkmoon]

That's when two parts don't mate, they overlap. It actually isn't a "fit," because the interference prevents the fit.

Are you familiar with the term "press fit," where the parts are tight enough that you have to press them together? Take it one step farther. In an interference fit, if you tried to push a dowel of .252" diameter into a hole of .250" diameter, it would go only if the dowel was soft enough to allow some material to be scraped off as it goes. That's an interference fit.

If you truly have zero clearance at the barrel hood, the barrel may not actually be mating properly to the slide. 1911Tuner probably remembers by heart what the clearance should be ... I don't, I'd have to find Kuhnhausen's book and look it up. I'm pretty certain there should be a couple of thousandths clearance there.

[The Cod Father]

That actually makes sence as it seems that the slide is trying to push the barrel further but there is no more room . Is id just a matter of removing some metal at the breach end to allow the slide to go further ?
Or do I have a more serious solution that needs to be looked into?

Thanks
TCF

[1911Tuner]

The hood is a little too long, and is wedging the front faces of the barrel lugs hard into the rear faces of the slide lugs. A light interference fit is desireable for tightly fitted bullseye guns, but carry guns should have a little clearance. I like to see about .003 inch there.

Use a smooth mill file to remove a little material from the rear face of the barrel hood. Take a couple light cuts and try it. Be careful to keep the face of the hood square to the breechface. Adjust to one side or the other as you go. When the slide will just go to battery with a little snap, you're almost there. Take lighter cuts until it will go into battery easily. Remember that the underside of the hood should be lightly beveled. For that, you'll need a scrape of some kind. You can use a small high-speed steel lathe blank, or make one from a triangular file by removing the cutting teeth on a belt sander. In a pinch, a small pocketknife blade will do, but keep the edge perpendicular to the cut or you'll gouge the steel. Slow, but it'll work.

Use the file to break the sharp corners.

[Todd C]

Kinda sounds to me that you have a gunsmith fit bbl. with extra stock on the feet. The comment about 1/32 of bbl sticking out of the bushing has me worried. Taking a few .001 off the hood isn't going to get that bbl back to flush (which it shouldn't be anyway.) Sounds like stock on the feet is keeping you from going into battery, irregardless of hood fit (which I am not saying is correct or not)

[The Cod Father]

I did Todd C but I sent it back to Dlask and had them fit the barrel since I didn't have the milling machine etc that I would need ,however it dosen't appear that much was done ....
This build has just been one comedy of errors after another

[Hawkmoon]

This build has just been one comedy of errors after another
So was my first build ... and my second. But what I learned from both experiences is priceless.