EGW lists an "Angle Bored Bushing", for a 1911. What is that and do I need one when I replace a barrel bushing?

It is a barrel bushing.

Standard barrel bushings are bored out parallel with the slide. When the barrel tilts up at the rear into "lock up" it can bind on a tight bushing. Gunsmiths relieve the relevant parts of such tight bushings so that the barrel will "lock up" with zero clearance on the bushing yet with no barrel spring (bending). EGW sells bushings with this angle built in.

I installed one on a SA slide with a Kart barrel. I measured both the slide ID and the barrel OD and had them supply the right bushing. It was still a hard fit part, but needed just the final fitting and lapping to fit perfectly.

Saves time and the one I've used was well worth it to me.

Did you fit it yourself?

Yes, and I don't have a lathe. If you measure carefully, EGW will make it so close that all you need is lapping compound to fit it in.

Its easy to turn down the OD of a bushing with a standard drill or dremel. I've used a sanding drum inserted in the bushing to spin it and stone or sand paper on a file to reduce the OD. Just make sure that the bushing is square. Its easy to see if its not while its spinning.

The ID of the bushing is a little trickier. The EGW I did was so close all I needed was lapping compound. If I needed to remove more material, I'd use an expanding bushing reamer. Brownells sells one.

Spherical Ring Oversized and Drop-In Bushings and 1911 Auto Spherical Oversized and Drop-In Bushings and Rings

http://www.briley.com/1911autospher...gsandrings.aspx

Really sounds like the way to go.

Don't kid yourself. Read the bottom line of DG12's link where it says "Rings are selected to be 0.001" over the OD of the barrel." That 0.001" in the uncertainty of the position of the muzzle within the bushing translates to 0.4" in the POI at 50 yards and a NM bushing can be fit with less than that.

But, in the grand scheme of things, what's 0.4" at 50 yards? You couldn't tell the difference with a Ransom Rest!

It's great to play with your toys but what's the matter with your current bushing? If the pistol shots straight why mess with it? Can't believe I said that actually cause I mess with mine all the time!!!???

Boehlertaught sasked why mess with it? I am getting an inexpensive but tighter bushing and plug in a SS finish to change it up. Besides I'm a former machinist.

The rep emailed me with my clearance question and said that .0001 was the what thyer recommended. I use Gunzilla and I'm sure any oil and debris might be an issue, I would go with less than .010 for sure.

I have a problem with the factory bushing. It was fit improperly and has a lot of play in it, so I'm looking for what works best.

I recently replaced my worn out original factory bushing on my 80 Series Gold Cup. I used the match, slightly oversized EGW NON-angle bored version. It required only a slight bit of polishing and the fit is perfect in the slide and the barrel.

I later noticed the angle-bored offering, and might consider it for my Commander sized P-13.45. The shorter length of the Commander bushings might benefit from the angle bore.

Last night I spoke to EGW and ordered an Angle Bored bushing for my DW. I figured it will fit better than me hacking one up. They will be running bushings next week, so should have it in a couple weeks.

Just an update. The bushing was installed with a tight fit in the slide and on the barrel. No springing when the barrel is locked up. Very pleased. Thanks EGW.

How much did it reduce your group sizes?

Did you have to do any lapping on the bushing to slide fit?

No, I didn't have to lap, file, polish, but what I did do was clean, lube and assemble carefully. This is a very close fit with no felt movement in lockup.

Maybe not. 0.001" of muzzle slop translates to only about 1/16" at 7yds. So if you got rid of 0.010" of slop (and that's a lot of slop) your 7yd group size would theoretically be reduced by 5/8".

FWIW, Colt uses a bushing design for it's pistols that use a shorter bushing contact area that reduces the chance of barrel springing. It is a different solution than EGW angled bore for the same problem. I find that the barrel clearance on the Colt bushing is very tight for a drop-in.

Colt bushing on left

Nice pic. I have a Brown drop in that I would like to take a broaching cutter to.

Just fired off about 50 rounds. Everything ran well with four different mags. Maybe I was trying to shoot better, but the grouping looked smaller with less flyers than normal.