98Z5V

Nothing, really. There are no drawbacks to that twist.

Here's a report vs. whitetail http://ar15hunter.com/forum/index.php?/topic/23-25-45-sharps/ There are many more testimonials on www.quarterbore.net. It's quite the deer cartridge, man. http://www.quarterbore.net/forums/showthread.php?t=9418

I think we're about to throw down some Myth Busters shiit in here...

Now, when I look UBERclose at that pic, those two cam pin slots MIGHT be in the exact same location, front to back... Pic lighting and an oil smudge make the Armalite look further back than the DWilson...

My take on that is no, but there is a difference in the bolt, and that's giving the perception of what you see. My reasoning for that is: Both those bolt faces are flat on the table, and both those carrier body fronts are at the same height. So, the bolt drops back in the carrier, into the firing position, to the same depth. If they didn't, then some serious other things would have to come into account, primarily manufacturing barrels for headspace... However, that cam pin slot is definitely different on the two types. Only way for that to happen is: that cam pin hole n the bolt is in a different place on the Armalite and the DPMS-based. No other way around that, I'm thinking. If the hole was not in a different place, and the same on both those bolts, you couldn't get away with having the cam pin slot in a different place, or different depth (front to back). My reasoning sound logical? I'm guessing, based on what I see, but it makes sense in my mind...

New(er) from Hexmag - Rainier Arms is pricing them at $17 each, and I haven't looked anywhere else yet. Quite the affordable option for the Big ARs. *** Be advised, directly on the Hexmag website, these are listed as "AR-10 Magazines." If you're an Armalite owner, you know the difference already. They're not really "AR-10 Magazines..." Be forewarned. https://hexmag.com/ar-10-magazines FDE flavor, as well...

Of interest - on both your flavors of "BIG BCG" here, the front of the carrier, the bolt height when in the firing position, AND the shelf that the charging handle grabs onto - are all in the very same position. The gas key is in a slightly different location, and the cam pin channel in the carrier body appears to be in a slightly different position. This all affects timing in the direct impingement system, and it's just two different ways or techniques to accomplish the same thing...

Nice score, man!

^^^Awesome! Have then wait for the bunny!!! Happy Easter, guys.

^^^ Interesting, Jim - big time. In MY pics, that 308 BCG was a DWilson, as well, compared to the AR15. Here, in yours, it's Armalite AR-10 on left and DWilson DPMS-based on the right - and the Armalite is even further back than the DWilson. So, with the Armalite AR-10 compared to the AR15, there would be a bigger difference... and a greater need for a longer gas tube, in order to properly cycle the weapon. The bottom line of "normal" in all this was before everybody and their brother decided to jump into the Big AR World here. People mostly did it right, on parts. Doesn't matter is a barrel maker drilled the gas port in the DPMS position, or the Armalite position, on the barrel - they told you if it was out of the ordinary, and make certain to use "xy" gas tube. Now, people that are making barrels, and gunsmiths in shops, don't even know there's a difference to begin with - it's gotten that bad. "Normal" was that the gas tube comes back to the center of the cam pin cutout in the upper receiver. If you had a DPMS-based barrel, it just uses AR15 gas tubes and comes back to that location. If you had an Armalite AR-10 based barrel, and used a short gas tube, it doesn't extend to the correct position. The fix is easy enough - after diagnosing why your rifle runs like shiit sometimes, but works great with other ammo, and drilling gas ports up, and adding adjustable gas blocks (which DO NOT help this situation...). You get my point... I think we should move this thread to one of the technical sections, then pin it...

Yes, definitely. I've had one in my DPMS (actual DPMS) LR308 upper receiver/rifle since 2012, I think.

This may or may not help, but it's worth sending a dozen magazines downrange and checking results.

My run, with carbine thrown in at the end.

Fixed that one for ya, brother...

Getting closer - these beasts are what I will go with most of the time. Sierra GameKing 90gr BTHP and RL-7. I cannot wait to put one of these in a coyote. Dies and barrel should be in next week.

Your wish is my command - Shooter Ready?!

Here's Larry's pistol run:

Damn, these vids are large files - still downloading, just to turn around and upload the things!

I'll upload those right now, brother - where's the vid of you, man?!

PRI. Precision Reflex, Delta series.

Exactly. That front sight post should be the first thing in your focus, on target, as you're going out, flat. Front sight, front sight, front sight. On target as soon as the front sight is in your view - you'll be flat, and have front/rear sight alignment by the time you're all the way out. BANG. Back in at your chest, right in your face- that's your workspace. All reloads, clearing of/tending to malfunctions, and any time NOT on target happens in your workspace. We need a Mike Pistol Vid - he's the ArcFuckingMaster.

This is what we were talking about and doing at the end of the shoot, brother.

Gone. Sold out. 375 rifles at $3,200 each. Rifle numbers 1~125 were sold at Christmas time. This was 126~500, with Mark LaRue keeping #500 as his own. That's $1,200,000 for those 375 rifles...

Sweet!!! I knew it wouldn't take long, from me to you, but I didn't think it would be the next day!