Question for Greg - Wasn't there recentlya 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.
The best firearm for self defense? Any loaded one will do.
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
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.