This is my second topic in here. A couple of guys came through in fine style on the first one. Anyway, i'm having problems getting my beowulf to feed properly. I have the factory issued 6 rd mag and it jams on the 4th or 5th round. The first three always feed good, but the bottom three almost always give me problems. Any suggestions? Ideas? Comments? Thanks.

I would suggest trying some of your other AR mags.
If it feeds ok through them maybe there's some thing a little off on the other ones.
I've been using the Thermolds  and have had no issues.
But haven't ever had any problems with the factory mags.

Is your stock full length?   I had the same problem as I was running an ACE shorty skeleton stock on my Beo.  I put the full length Tele-stock back on and it works fine.
John

i have the adjustable stock on it. i can't remember whether it feed badly with the full stock or not. i'll flip them to see if that is it.

I have the A2 stock on my Wulf, runs fine with USGI mags (unmodified).

had problems with the car length stock but never any with the rifle length stock with either the factory mags or thermolds.

The feed problems in some guns are due to the fact that Alexander Arms does not cut a radius on the chamber entrance.  They cut a straight angled chamfer which leaves a relatively sharp edge for the case body to traverse during feeding.  If you allow the case head to release from the lips earlier, or hold the case generally higher would help the issue.  But the real problem is the lack of a radius cut on the barrel root.   A straight cut works fine on small calibers like .223, but not so well on the big bores.

Quoted:

...If you allow the case head to release from the lips earlier, or hold the case generally higher would help the issue.  But the real problem is the lack of a radius cut on the barrel root.   A straight cut works fine on small calibers like .223, but not so well on the big bores.

Howdy Tony,
I was just about to set-up my Beowulf with a CAR buffer tube and happened to read this topic/post. Glad I did. Do I understand you correctly, I can either remove some metal from (shorten) the mag feed lips or open-up the the mag lips (i.e. elevate the round) and alleviate the issue? If so, approximately how much of either? I understand the need to watch the alignment of the bolt lugs.

I'm prepping the Wulf for deer hunting this fall and the last thing I want is for a follow-up shot is a silent "squish" from the trigger. I stalk-hunt real thick stuff and the deer are usually on the hoof - follow-ups are mandatory.

I'm going to post a new thread regarding the use of CAR tubes for more visibility.

FWIW, I must say I'm impressed that you would wllingly give advice on doctoring a primary market competitor's product. If I had been aware of the 458 a little earlier...

Quoted: This is my second topic in here. A couple of guys came through in fine style on the first one. Anyway, i'm having problems getting my beowulf to feed properly. I have the factory issued 6 rd mag and it jams on the 4th or 5th round. The first three always feed good, but the bottom three almost always give me problems. Any suggestions? Ideas? Comments? Thanks.

I went through some pretty bad feed failure problems that turned out to be caused by short cycling. I finally determined the root cause, which was somewhat complex but very easy to fix. So what are the specific symptoms that you are experiencing? Also, does the bolt lock open after the last round?

the round doesn't feed completly into the chamber. The bolt will strip the round partialy so that it is sitting at an angle. It looks like its giving it enough to knock it out of the mag, but then slips on top of the round and the bolt comes to rest on the middle of the round. As for the bolt locking after the last round, it usually does. Very seldom will it close on an emptly chamber.

Quoted: the round doesn't feed completly into the chamber. The bolt will strip the round partialy so that it is sitting at an angle. It looks like its giving it enough to knock it out of the mag, but then slips on top of the round and the bolt comes to rest on the middle of the round.

I had an AR doing that and it was diagnosed as an overspeed bolt.   Try using a 9mm buffer.  

http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=5574&title=CAR-15+COUNTERWEIGHT+BUFFER

My Beowulf feed problems also disappeared when I added more weight to the bolt carrier. I used Tubb carrier weight with the heaviest carbide insert. As an added benefit, it tamed the recoil to the point that even my twelve year old daughter can now shoot the riflle without any problems. I bought mine from Midway, though I believe that you can get Tubb weights from quite a few different places.

www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=598476

Left some rounds in a Thermold mag for about a month.  Went and tried to shoot it the other day and experienced failure to feed problems.  Maybe the Thermolds should be stored empty.  Placed the rounds out of the Thermold into an older GI mag (no modifications) and it fired perfectly.

I misunderstood the problem from your first post.

If the bolt is missing the case head (going over the top) and catching the round in the middle of the body, then your gun is either short stroking, or the case head is sagging low in the magazine.  Since you said it will lock back on the last shot, I would discount the short stroke problem.

It could be a mag lip problem, but since it works most of the time, I would venture that the spring pressure is not balanced correctly across the base of the follower.  You do not have enough pressure toward the back of the follower which is allowing the round to sag the rear end.  Tweak the top coil of the spring so it presses up less on the front, and more in the rear.