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Post by lowman on Dec 18, 2021 14:35:12 GMT -5
I recently acquired a .22wmr/20ga barrel set. I had to do some hand fitting for the barrel set to fit my camper receiver. I am also having to modify the 20ga barrel extractor to work with my camper receiver. But besides the modifications needed, the .22wmr barrel and 20ga barrels fire flawlessly. The .22wmr chamber sticks fired cases in the last quarter inch every time. I’ve tried hornady and CCI brass. I removed and cleaned the extractor/spring, and the slot for it, the extractor works well and the spring is strong. A new cartridge slides in and the extractor will push an unfired case out easily. With a fired case, the extractor will not push out at all. You can not even put a fired case that you’ve just pulled out back in without it getting stuck back in the last quarter inch again. I’ve used 22 bore brass brush on a drill to clean the chamber and there is no reamer marks or scars in the chamber. Just wondering if any of you have any suggestions.
Thanks in advance,
Lowman
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24combo
Frequent poster
If you build in a swamp you may have frogs.
Posts: 113 
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Post by 24combo on Dec 19, 2021 6:10:14 GMT -5
I wonder if at some time in the past .22lr wasn't run in the wmr chamber and it eroded the chamber creating a rough spot where the case expands and sticks. I've heard of this happening just because the 22lr was available and the 22mag was not. It's not a good practice as the chambers are different.
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Post by jrguerra on Dec 20, 2021 5:11:22 GMT -5
Its hard to speculate why this would be occurring with only a fired case vs. unfired. Years ago, I had a similar issue with a .22 Magnum Woodchucker but the solution was found immediately. A single tiny burr, leaving a scratch along case, indicated the chamber required a more thorough polishing. The gunsmith did the work and the issue disappeared completely.
I wonder if marking an unfired case with Marksalot, then inserting, firing and extracting would show an indication where the issue is. Be a good idea to insert the rim conspicuously so that you know exactly where the sticky spot is.
Years ago, I wanted to ream out a Camper chamber for 22 Magnum. A purchase of a Russian O/U combination stopped me from proceeding with that step. I hope you find your answer soon.
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Post by lowman on Dec 20, 2021 5:59:23 GMT -5
I like the idea of marking a case then firing, I’ll probably give that a go. I got the barrel set for a song but it came off of a 24D series P that had a stud on the barrel lug of the receiver to push the extractor of the shotgun barrel. I ordered 3 extractor pins, a new blank extractor, an extractor spring, and an extractor lever from numerich. I drilled the hole in the front barrel lug for the extractor lever fulcrum point then marked and spilt the front lug with a dremel cut off wheel to accept the lever and spring. Took a couple of hours and some filing to get right. I didn’t end up using the new extractor but I cut the factory one down. It extracts spent 20ga shells without issue. I now have the original 22lr/20ga barrel set with 20” barrels and an open cylinder (0.625), and the 22wmr/20ga barrel set with 24” barrels and a full choke (0.575).
I’ll try marking the case of a 22wmr and let y’all know what comes of it. I did put a micrometer on a few fires cases and the mouth of the case is 0.215, midway is 0.220 and near the rim is 0.225. There goes my theory of the mouth of the case being too wide to come out easily. If the chamber needs reamed or polished, it’ll have to go to a smith, I know my limitations.
Thanks,
Lowman
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Post by lowman on Jan 17, 2022 18:16:48 GMT -5
After some thought, I decided to get some medium grit scotch brite pads, cut them to go in a patch holder, trim them so they would fit into the chamber when folded around the plastic patch holder and soak them in gun oil. I wrapped a pice of tape to the spot on the patch holder measured with a spent casing. I then got the patch holder with scotch brite in the chamber up to my tape mark and chucked it up to a drill. 10 seconds of spin and I pulled the whole contraption out. The extractor worked for 3 of the five test shots. I repeated the process for another 10 seconds with a new piece of scotch brite pad and for good measure went back and forth in the chamber to my tape line a few times after my 10 seconds at the tape line. The extractor worked as it should for 10 out of 10 test shots. I’ll call that fixed and good!
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24combo
Frequent poster
If you build in a swamp you may have frogs.
Posts: 113
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Post by 24combo on Jan 17, 2022 20:15:49 GMT -5
Sounds like the chamber walls were a little dirty. Hope it does the trick for a long time.
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Post by jrguerra on Feb 7, 2022 5:25:39 GMT -5
Glad you got this ironed out (or at least minimized). Smart thinking on your part to get this DIY solution done - thank you for letting us know about it.
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