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Post by GLSHOOTER on Apr 23, 2017 19:57:54 GMT -8
Question for Greg - Wasn't there recently a thread involving cycling issues that were caused by rough edges in the bolt and/or barrel extension lugs? I recall something along that line that was corrected with a little smoothing of the lug edges/surfaces... The issue was more scratches and some gouging of the cases/bullets. A tiny bit of breaking the sharp edges takes care of that. It really won't effect the cycling to any degree. Greg
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Post by triggerpull on May 23, 2017 10:45:33 GMT -8
Brand new to this forum (though Greg probably knows me from past years in the old BHW forum--Hi Greg).
The 25 x 45 should cycle about as easily and reliably as a plain-jane 5.56. My advice--before you go down the rabbit hole of "chamber pressure musical chairs" try to eliminate a few problems which may or may not go away simply by adjusting the pressure (or mags). My first question: When your spent cases were being left behind in the chamber--were they "sticky" and show resistance to getting them cleared? Did you measure them in a case gauge before and after firing to see if there might have been any notable expansion/stretching? Point being, you may have something as simple as a badly configured extractor on the bolt which could be failing to grab the rim. spent cases usually have a "tale to tell" and I would look for signs of unusual damage to them, shavings in the receiver etc. Lots of home builders (I did, at first) assume that a barrel and bolt--even when headspaced by the manufacturer--will necessarily line up properly and be timed to eachother--but that is not always the case depending upon how well the barrel trues up with the upper and bolt; and even minute misalignments can cause problems.
I'm assuming the barrel has at least a mid length or rifle length gas port--in some cases your exhaust gas impulse may actually attempt to extract your cartridge before the "dwell time" has allowed the case to contract back
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Post by wfa on May 31, 2017 18:20:35 GMT -8
Dirwood, did you ever get your 25-45 to extract/feed properly? Have you tried 10 round magzines? I've had issues with some 20rd mags not feeding the 25-45 when filled to a full 20 rounds.
Walt
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Post by dirwood on Jun 30, 2017 2:08:48 GMT -8
WFA, I did get rifle to function properly, took a combination of enlarging gas port and a reduced power buffer spring and now it runs great. Couldn't be happier with its function and accuracy. My apologies for taking so long to post back my results.
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Post by langenc on Sept 17, 2017 16:03:01 GMT -8
Wonder how this ever came out. I had similar problem and a different lower w/ rifle length buffer and weight fixed it for good..
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