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Legacy Member
Beaumont Extraction Issue
Good Evening. Got the new Beaumont to the range today and did some nice shooting. However, rifle failed to extract the spent case every 2/3 cycles. Cases do come out easily by hand/screwdriver and they are 50-90 formed cases. Suggestions. Thanks, Randy
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04-06-2014 08:39 PM
# ADS
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Advisory Panel
Possibilities:
1) the extractor is badly worn, or just plain crudded up in the corners, and has effectively lost its "hook", so that the extractor is slipping over the rim
- visual check with a watchmakers eyeglass.
2) the chamber has a local depression (old rust pit), and is holding back the expanded cases so much that the extractor is slipping over the rim
- visual check for "bumps" or rings on the fired cases. Measure and compare with unfired case.
3) the case is a touch oversize, and is being rammed in by the bolt.
- careful measurement of case and chamber/fired case.
Quite possibly a bit of all three!
Last edited by Patrick Chadwick; 04-07-2014 at 10:59 AM.
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Thank You to Patrick Chadwick For This Useful Post:
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Legacy Member
Thanks Patrick. Hook is fine, no depressions in the chamber, and cases measure OK. Still at a loss to figure it out but it is a beautiful shooter. Randy
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Seems to me that the rims are roughly 0.020" smaller in diameter, but actual measurements from your reformed cases might help.
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Thank You to jmoore For This Useful Post:
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Advisory Panel
I think jmoore is correct.
I had overlooked (jet lag!) the simple fact that the cases are reformed 50-90s, which means that not only is the base diameter clearly undersized for the Beaumont- so hardly a cause for jamming in the chamber - but the rim is also undersized, making it much easier for the extractor hook to slip over the edge.
Solution?
Use reformed 470NE cases - if you can find any at an acceptable price.
Maybe make up a replacement extractor with a longer hook? Basically a dead slow cutting and filing job. But you only have to do it once.
If you are not worried about altering an original part - weld a spot onto the present hook and file to shape to make the hook longer. The extractor will then almost certainly have to be remempered.
I would go for a D-I-Y replacement extractor. The low-risk, low-cost solution.
Last edited by Patrick Chadwick; 04-15-2014 at 11:07 AM.
Reason: these typos are getting me donw!
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Legacy Member
Gentlemen, spent a day at the range on Sunday and the Beaumont worked great. Cannot explain but will send rim measurement tomorrow. Thanks, Randy.
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Second use brass or freshly reformed like before?
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