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Brass getting stuck in the chamber

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  • Bradmartin78

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    It did very well the first trip out. Had some tight groups. If McGowen won’t replace the barrel I’ll work on the chamber. My buddy is having the same trouble with his 33 Nosler barrel from McGowen. He polished the chamber and it’s a little better, but still has problems ejecting.
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    Younggun

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    The ring on the primer matches the bolt face. I cleaned the ink off to show it a little better. Otherwise the primer is smooth. I think it’s a rough chamber.

    In the first picture it looked like that ring was pressed in, much clearer here. First bolt face I’ve seen with that type of ring ground in to it. Interesting.


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    Wiliamr

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    Did you or McGowen cut the chamber? You say you used go/no-go gauges so I assume you installed the barrel - It looks like the roughing reamer was the last tool in that hole, or the finish reamer was worn out- dull.
     

    avvidclif

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    The ring on the primer matches the bolt face. I cleaned the ink off to show it a little better. Otherwise the primer is smooth. I think it’s a rough chamber.

    Difference of opinion but anytime a primer flattens to the point the rounded edge is no longer there or almost gone and the primer flows out around the firing pin are both signs of overpressure. I was not looking at the ring caused by the bolt face.
     

    Bradmartin78

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    In the first picture it looked like that ring was pressed in, much clearer here. First bolt face I’ve seen with that type of ring ground in to it. Interesting.


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    I bought it from a friend who started a build and changed directions. I asked him about it yesterday. He confirmed it was new from Remington. Remington might be the next email going out.
     

    Bradmartin78

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    Did you or McGowen cut the chamber? You say you used go/no-go gauges so I assume you installed the barrel - It looks like the roughing reamer was the last tool in that hole, or the finish reamer was worn out- dull.
    It’s a prefit. McGowen did the work and will be sending a shipping label to send it back.
     

    Bradmartin78

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    Difference of opinion but anytime a primer flattens to the point the rounded edge is no longer there or almost gone and the primer flows out around the firing pin are both signs of overpressure. I was not looking at the ring caused by the bolt face.
    The picture isn’t great. There isn’t a crater around the firing pin hole and the edge of the primer is rounded. Not trying to argue, sir
     

    Younggun

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    It’s not a great method anyways. Some primers have very soft cups while others are very hard by comparison. So you can say a load is fine or over pressure by simply swapping primers.


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    Younggun

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    Also, a somewhat tighter primer pocket vs one that is no so tight (looking at you Hornady shit brass) can cause primers to flatten more easily.


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    hornetguy

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    A loose primer pocket can cause flattening... when fired, the primer starts to back out of the pocket, then the case smashes back into it, flattening it around the edges. If the chamber is rough, it could retard the rearward movement of the case long enough to allow the primer to start backing out. This can happen with fairly mild loads, as well.... which makes the shooter think it's high pressure, when in fact, it's the opposite.
     

    Bradmartin78

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    The barrel came back from McGowen yesterday. They cleaned up the chamber. When the rain stops I’ll make a trip out to the range to see how it goes. E00924BB-53F9-4085-BF97-CC94C76BB401.jpeg 3DF16BCA-CA63-4C87-A3BD-57568C9EEDE4.jpeg FE62A1F3-0F0B-4CE8-829F-9FD0B5CA05EB.png
     

    Bradmartin78

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    Made it to the range. Loaded up a handful of different combinations of bullets and powder. 100% better. Brass comes out clean and I was able to run the ammo that wouldn’t extract from the trip before. The groups look promising.
    Thanks for all the input. E2CFBC49-33D1-46D1-A344-A8A5C7CAE714.jpeg
     
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