Overgassing?

[Jeepejeep]

I noticed almost all my brass goes forward. What is the best/easiest cure for this? Maybe this is contributing to my jamming problems too. Thanks in advance.
Jim

[commander faschisto]

Yep...your brass should be landing in the "3:00 - 4:30" area if all is well with the timing. You might need to install one of Hoot's CCWS weights? I did that to mine, and it works exactly as advertized. I'm sure others here know all about this problem.

[wildcatter]

Could be overgassed or the lube you are using is the best in the world, could be allot of things. My thought is, .."is the weapon otherwise working"? If it is and there are no other ancillary problems, you really, at that point, don't need to be looking for a cure to a problem, that doesn't exists. Of course, you allude to jamming issues, that may be an ancillary problem.

I assume you are properly lubing the rifle, but are still jamming the weapon. How often does that occur and tell me about your lubing practices?..

..t

[Jeepejeep]

I clean the gun completely with Gun Scrubber, brushes, pipe cleaners, etc. I use break Free CLP as a lube and leave the bolt "wet". I have lubed the spring in the stock and always put a little on the moving parts of the trigger group.
I get stove pipes with the empty case getting trapped by the next round with every mag I use which includes three 5 rounders from Bushmaster and a 9 round Stoner. I just modified a SIG mag. to make it NY legal by installing a 450 follower from one of the other mags and blocking it to only hold 10 rounds. Haven't shot it yet though. I also have modified one of the 5 rounders the way Hoot described in another post by cutting a few loops off the spring. Hopefully that will work. Usually I get 3 rounds off before it jams. I love the gun but it's getting frustrating getting it to be reliable. All the help I'm gettibg here is great and I thank everyone.
Jim

[Jim in Houston]

I get stove pipes with the empty case getting trapped by the next round with every mag I use

There is more information on this topic here - http://450bushmaster.net/viewtopic.php?f=2&t=741&p=14380&hilit=jamming+stovepipe#p14380 - and here - http://www.450bushmaster.net/viewtopic.php?f=2&t=1523&hilit=jamming+stovepipe - and here - http://www.450bushmaster.net/viewtopic.php?f=8&t=5024&hilit=jamming+stovepipe. I think there is at least one other thread as well. Search failure to eject, extract, jamming, and similar issues.

I initially had the same problem (as you will see from my posts in the above links). Many people go through a lot of agony measuring and ajusting the magazines. However, after running 100 or so rounds through my three mags, they seemed to "run-in" and I haven't had a repeat of these initial jams.

[Jeepejeep]

Thanks, Jim. I've read those posts (one of them is a thread started by me) and I have performed the suggested corrections as I said but haven't been back to the range to try it out again. Hopefully the jams will stop but I was wondering about the ejection to the 2:00 position mostly. I really doesn't bother me that much as long as the gun is reliable and ejects properly every round.
Jim

[Jeepejeep]

Finally! I got to shoot the 450 today after modifying 2 of the Bushmaster SS 5 rounders. I tightened the mag lips and shortened the springs a few coils. I only shot 20 rounds but it was flawless. The brass still goes slightly forward but as long as it's accurate and reliable that's all I need. Thanks for everyone's help.
Jim

[commander faschisto]

Huzzah...and the peasants rejoiced!

[Colohunter]

Excellent, glad to hear you got it running. There are few things more frustrating than an AR not working properly.

[commander faschisto]

Boy, howdy!! Just ask any Vietnam vet...