Regular Guy wrote:Nothing appears out of place. There is a gap between the barrel extension and the reciever but I don't thing that is the issue.
Yeah, to me either.
One of the reasons that this whole deal is kind of frustrating.
Browning35, how you tried other ammo apart from the BTHPs? I'm wonder if this is an ammo issue or bullet design issue as opposed to something wrong with your gun. Try a FMJ or a ballistic tip. I just wondering it the hollowpoint tip is catching the flat part under the feed ramp whereas a FMJ may be able to over come that area.
OKay, my dumbass went back a read you have tried different ammo.
That's not a big deal bro, I've done the same thing with posts before (glossed over stuff...the OP was kind of long anyway, easy to miss that part of it).
To answer your question a little bit better I've used these specific brands, grain weights and bullet types and I had problems with them all (meaning reliability...NOT
accuracy).6.8 SPC Ammo Tried Out, Tested And Used
- SSA 85gr Barnes TSX
- SSA 90 Grain Speer TNT
- SSA 95 Grain Frangible
- SSA 100 grain Nosler Accu-Bond
- SSA 110gr (Sierra) 'Pro Hunter' Soft Point
- Hornady V-Max 110 Grain
- SSA 110 grain Barnes TSX
- Sellier & Bellot 110 grain BTSX
- Remington 115 Grain 'Metal Case'
- Rem Match King 115 grain
- SSA 115 grain (Sierra) OTM Boat
Since this cartridge was new to me I tried a wide variety of ammo as quickly as possible. Most of the ammo I bought from Palmetto State Armory (*Click*)
, from a local gunstore in Dallas and a gunshow in Mequite (the S&B and a little bit of Remington). Some of the ammo listed above I've only shot a single 20 rd box to try it out (like the S&B) and some I've shot 80-100 rds of that particular brand/grain/bullet type (SSA 115 grain OTM). Overall I've shot more SSA and Hornady than anything else simply because that's what was available. The Hornady V-Max 110, the SSA 110 grain Nosler Accubond, the SSA 85 grain Barnes TSX were particular favorites for hog and deer hunting.
The issue ISN'T
accuracy (which is actually great when it works), it's the reliability.
For practice and sighting it in I used the SSA 115 grain OTM.Mags Used
For mags I used several different C-Products 25 rd mags, a PRI 5 rd mag and a Barrett 30 rd mag. It didn't matter which mag or which brand/grain/bullet type I used...I think the issue is with the rifle, not the mags or the ammo as I switched everything out and tried different combinations and I still had the same problem.Cleaning, Lubrication And Switching Out Mags/Ammo As A Potential Cause Of These Malfunctions
When the rifle started acting up (about the 400 rd mark) when I (finally) managed to get a bullet chambered I'd have at least 1-3 malfunctions per 5 rd mag or 5-8 malfunctions per 25 or 30 rd mag where the bullet would get stuffed get back into the case. Cleaning and lubrication and changing out the mag and/or ammo didn't seem to make the slightest bit of difference.
If that doesn't clear it up is appears the mag is not seating high enough in the gun so this appears to be a mag issue. If the mag doesn't seat high enough then the bullet smacks into the flat part under the reciever. Do you have another lower you could try with this gun?
I had a steel Brit surplus mag that would seat properly and caused this problem with an AR15 in 5.56. I gently relieved the bottom if the mag retention hole and the mag sat up about 0.05" and the mag functioned fine. It's a range only mag but it works.
Yeah, that's actually one thing I haven't done. (switched out the lowers with my other AR's)
However since this lower works fine with that BCM 5.56 20' upper I'm pretty sure that the lower's good to go
and that the issue's just with the upper. It would probably be better to rule that out as well just in case to cross yet another possible cause of this problem off the list, but I don't think I'll get to the range by tomorrow.
Update us please.
I will, I'm shipping it back to Stag Arms tomorrow (Stag sent a label to my email the next day)...so I'll give updates on the customer service and what happens once they ship it back.