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Need help determining causes this on a NEW 1911A

PauperPauper Member Posts: 117 ✭✭
edited August 2012 in Ask the Experts
A friend of mine and I are trying to figure out what is cause a Factory New 1911A1 Rock Island Armory (Officer Type) to dent the casing about half way between the shell head and the front end of the hull. I know that these aren't really high end 1911 style pistols, but I wouldn't think this should be happening.

When fired, the pistol extracts and ejects every shell casing just fine but every casing has a pretty significant dent in the side of every shell casing in the same place.

First we tried another brand new recoil spring made for this pistol thinking the one in it might be too strong. That didn't seem to help.

We then thought it might be a failure of the ejector to strike the empty shell case soon enough to allow the empty case to fully clear the rear of the slides ejection port prior to leaving the slide resulting in the empty shell casing striking the rear edge of the slides ejection port opening.

Or, could it be that the extractor claws cut (angle cut on extractor claw) is a little off some how, possibly causing the shell casing not to extract at the proper angle so as to cleanly clear the slides ejection port opening, thus causing the shell casing to strike the rear part of the slides ejection port opening when the shell ejecting?

Any ideas or help related to what is causing this would be appreciated.


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    TRAP55TRAP55 Member Posts: 8,270 ✭✭✭
    edited November -1
    The case is bouncing off the rear edge of the ejection port. Cure is to lower and flair the ejection port.

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    Riomouse911Riomouse911 Member Posts: 3,492 ✭✭✭
    edited November -1
    Yours is a common sight on casings fired from bone-stock 1911 slides. Trap showed a pic with the ejection port more commonly seen on higher-end 1911's. This little mod gets the steel of the slide out of the way of the brass as it snaps violently up-outwards during ejection.

    The extractor tension may also be an issue as Forge stated, it can bind the casing in place too long and become a reliablilty issue. But since it's working reliably and extracting cleanly it's probably only a royal pain if you reload your brass.
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    azpowerwagonazpowerwagon Member Posts: 376 ✭✭✭
    edited November -1
    Extractor tension...check. Recoil spring...check. May want to take a look at your ejector and adjust the angle at which the case head impacts the nose. Lowered ports and roll over angles just make life easier and look cool.
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    dcs shootersdcs shooters Member Posts: 10,969
    edited November -1
    Along with the others, it might need a longer ejector to get the case out sooner.
    Use a stright edge that fits in the mag well and put it against the rear with the slide off and see where the ejector is to the edge.
    It should be even or sticking out some with the same angle on the lower third of it.
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    v35v35 Member Posts: 12,710 ✭✭✭
    edited November -1
    Whatever you do, the ejector length needs to be short enough for a max length loaded cartridge to clear the front of the port.
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