Looking for some explanation of what's going on here and why, as well as the solution. I have a feeling it's simple, which has made me hesitant to ask about this, but as with anything else involving firearms, I know if I'm having this issue then someone else is too.
When the temp drops a bit here in the Houston area to what we consider to be a "little cold," which is in the 40's and 50's (Northerner's feel free to insert smart ass comments and jokes here), sometimes my guns have issues clambering a round when I'm either initially making ready or performing a speed reload.
For example if I hit the bolt release on a fresh mag of 28 rounds the bolt gets stuck halfway and only chambers 1/4 of the round. Obviously charging the gun will induce a double feed so I'll either strip the mag and try again (in which case it'll likely happen again with the next round) or I'll pull the CH back a half inch or so several times as need to finally shove the rest of the round in the chamber. Once I get most of the way the forward assist can be used if necessary. Then I commence firing.
Sometimes though, from there even though it gets shoved into the chamber the damn bolt doesn't even grab ahold of the round's rim, so it's literally loose in the chamber. Although that rarely happens.
Even manually charging the guy when reloading a full mag, whether it's from a closed or open bolt, it'll get hung up halfway sometimes.
This literally only happens in the cold, with the exception of one time when my gun was completely dry because I forgot to lube it on TD 2 and 3 in my recent TAPS class and dirty as hell with almost 4K rounds, some suppressed, through it.
But other than that one time, my guns are always nice and wet with Slip 2000 EWL. Always. I added some lube to my already-wet BCG/CH/Upper a few weeks ago when this happened, and it did seem to help barely get the job done, but even without a mag inserted and just racking the CH back and forth it seemed so damn sluggish. My friend was also with me and was shooting my other gun (both guns are BCM 14.5 mid-lengths, but this has happened in the past with 2 SBRs as well), and it had not even 500 rounds on it yet and felt mostly the same, once again it was nice and wet, too.
And although it may just be coincidence, this only seems to happen after the sun sets at night (I shoot a lot at night) in the 40's/50's (doesn't usually get colder than that), not during the day even if the temp is the same.
So wtf is going on here? Possibly mags? It's also occurred with brand new GI mags as well. I went ahead and changed the RE spring/buffer spring on the gun with 4K rounds, even though it was only a half inch shorter than a new BCM one. Try a different lube other than the Slip 2000 EWL?


), sometimes my guns have issues clambering a round when I'm either initially making ready or performing a speed reload.
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