It may technically be possible that the threads, when clean, are allowing enough pressure loss that the weapon malfunctions then when they carbon seal. It sounds very nerdish and labbish and all, but I guess we can't 100% rule it out?
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For a point of reference- my bcm 11.5” runs unsilenced with an H2 and sprinco blue. I expected it to be undergassed, but not the case.
Thanks guys. I think I'm started in the right direction. With your help I was able to diagnose that this BCM was in fact running too fast and not too slow.
The H2 is staying and I'll run the hell out of it next time I go blastin'.
Turns out I absolutely love shooting steel knock down targets and hangers. This being a new to me range I am getting a whole new realm of drills to do. I even see game wardens there utilizing barrels and pallets in new ways as well as their own vehicles.
Hopefully my focus on the gun running properly will subside and I can focus on myself again. I need to work on my back pocket mag grabs for sure. And I might look into a ambi mag release in case anyone has any recommendations there. Being a lefty, mag changes are the thing I most struggle with. I can work the bolt release, charging handle and safety with normal controls pretty well. It's just dropping and grabbing a new mag with my off hand that is not smooth. I used to be a lot smoother when I really slowed it down and gained speed throughout a class. But lately I just suck again. Haha that's another topic. Thanks gain folks.
Just train it. Don't go using AMBI stuff until you're G2G without it. Here is how I go about it, and I am sure that others will have likely much smoother/better tutorials (without the weapon cycling itself, it made it a bit trickier, lol!).
Also, tagged for pix of height-over-bore failures with gamewarden hood.
https://www.youtube.com/watch?v=s4g7HIGwMmo
For an ambi mag release I would be looking at Forward controls design EMR-A.
Generally speaking you want to shoot ammo traveling under 3000FPs on metal. With centerfire rifles, a good rule of thumb is 100 yards. Here is a link to a steel target safety manual:
https://shop.actiontarget.com/conten...fety-rules.asp
This is a thread on the subject which I started and many others contributed their thoughts to: https://www.m4carbine.net/showthread...azine-Releases
The lefty work-a-round is pretty simple. First, the rear pocket carry isn't ideal, but I've been there, done that.
Start by grabbing an empty magazine with your SUPPORT hand in a beer can grip, it's the example on the left: https://gundigest.com/wp-content/upl...load-Fifth.jpg The beer can grip is generally used for reloads from the strong side of the belt, and, in your case, the rear pocket.
Now, using that grip insert the magazine into the mag-well, but stop short of seating it (so you don't have to use the mag release - yet). Next take the magazine from the mag-well, still maintaining the beer can grip, and run your thumb up the seam on the back of the mag. Maintaining this grip, place the mag in your rear pocket. Pay attention to how you have to move your fingers to keep your thumb and fingers on the mag as you put the mag fully into your pocket. This is going to be the starting position for your mag grab.
For me I come into the pocket with my fingers and thumb aligned as when giving a hand salute. My my fingers curl around the mag as my thumb goes to the rear seam on the mag, I remove the mag from the pocket and as I rotate it into the mag well the thumb curls down arond the 'back side of the mag - grip the mag tightly at this point because you are going to firmly push the magazine up into the mag well and pull down to ensure it is seated.
Now, to remove the magazine from the rifle in a timely, high-speed manner: Put your thumb on the mag release and wrap the rest of your SU{{ORT hand around the front of the mag WELL. From that position, keeping your support hand in contact with the handguard/rail extend your support hand forward into a firing position. Figure out how to get around any VFG's, etc., because this is the path your support hand should follow after you push-pull the mag on the reload.
Go back and forth several times, making sure your SUPPORT hand thumb is hitting the mag release as your wrap your SUPPORT hand around the front of the mag WELL, and you are not wasting any motion extending back out into firing position.
Take two mags and practice dropping the mag from the rifle and reloading from the pocket. Remember - fast follows form.'
So, after we push-pull the mag, if the rifle has locked back, it is a simple matter to come up the front of the mag-well and rotate the support hand to use the index finger to hit the bolt catch and then, with no wasted motion, extend back out into firing position.
I learned these work arounds on duty rifles without ambi controls, they are now so ingrained that unless I tell myself 'use the ambi' I might as well not have them.
Hope this helped.
Excellent. I'll work on that drill. I have not tried swapping mags with my strong hand much. I always tried to use my right, support, hand since the mag release is on that side.
What I recall from a few classes was that the instructor always liked how smooth I tried to be. Back when I mock raced sport bikes on a closed track we all applied "Slow is smooth, Smooth is fast", I'm sure I can apply that strong left hand wrap around mag swap with being smooth.
Another easy fix for the bolt speed problem is something like a Bootleg adjustable carrier. I have a 6.8 SPC that was having the same problem with an AAC can. The adjustable carrier fixed that .
My bad, you are using the SUPPORT hand for all manipulations involving mag release, seating the mag and hitting bolt catch.
I emphasized touch points on the rifle more than either of these videos, because I believe that is the way to ensure proper form as learning:
https://www.youtube.com/watch?time_c...ature=emb_logo
(This guy gets a pretty weak beer can grip and his pull to ensure the mag is seated was weak or non-existent. This isn't as big an issue with a bolt back reload, however, if the bolt is forward it becomes more important as you have to defeat the spring pressure of the loaded rounds in the magazine to fully seat the mag, This is why many folks still download their 30 rounders to 28 rounds - makes seating the mag easier.
https://www.youtube.com/watch?time_c...ature=emb_logo (I use the beer can grip, LV doesn't really)