Albroswift

338 200 SST

308 150 SST

Some Cool Labradar screen shots from Saturday's session 308 180 SST

They say they can ship repairs both ways without ffl involvement but if they send with a new lower receiver I think It will need to go through a dealer, new serial number. Sent a M&P back to smith for repair in March and they just replaced the pistol, so needed ffl AND get this, ffl dealer needed receipt showing I paid state sales tax or he would have been forced to collect tax on actual value.

Well guess what. Sent an email to Anderson suggesting they send me a 12" gas tube, their reply was I have an older model that is known to have cycling problems and they want me to send it back and they will replace the upper and lower with their newest model. Not sure if I should take them up on that or not! + is new receiver - is shipping hassle and another transfer. I'm almost there, Im leaning towards a 15 dollar tube, but hats off to Andersons willingness to make it right.

Have been, that's why the questions Interesting science. I'll be doing some more testing into powders and bullet weights after I get all the mechanics correct. Got a couple nice loads to start from after yesterday's session.

Just wondering how much hot gas (if any) comes out of the tube after it disengages from the key. Kind of relating to the 12.06 tube vs the 11.75.

I like the science behind it, being a lifelong member of the society of torque and recoil

The bullet always tells the truth...

Correct, bullet is out about 100 yards when bolt travels 1 inch, so say bullet is at 50 yards when tube clears. How much pressure is still in the barrel?

I have a timing question, Advanced Reloading Class: where do you think the bullet is when the gas key clears the end of the gas tube??

Lucky they didn't use an AR15 barrel, everything else was...

Maybe mount the VX-II on my labradar...

Actually, the opposite, I believe: The hunting loads are optimized to accelerate the bullet linearly along the entire barrel, minimizing chamber pressure but maintaining a high pressure the whole length of the barrel. Easier extracting cases, less damage to the rim from the extractor. The AR Loads seem to like a faster burn rate, getting the bullet up to speed faster but less pressure during the dwell. IMAO, all my malfunctions are/ were due to the bcg cycling too fast and slamming into the back of the tube, (actually the upper's ears at first!) as we have slowed it down, first the 150 gr bullets started to perform, (More acceleration earlier in the barrel) Now everything with the AR optimized powder is performing. The hunting loads simply over-gas the system, even with the 6.8 buffer and all the other corrections we have made. I didn't have any factory loads left, but I would bet I would have mixed results depending on what the manufacturer intended for their use. While I have it apart, adding an adjustable gas block, The Superlative Arms looks like a nice unit, (and a 12-1/6" tube of course). I went really low with starting loads and still locked back so I bet I could lower the pressure in the gas system even a little more and work up a little more velocity, I was at 2725 with the 150's and was no where near max case volume or load data, should be able to get it over 2800.

My BAR 338 Win Mag Kevin Knight did his signature "slim-line brake" comp and played around with a couple other things for me must have been 15+ years ago. Working up some new loads, powder and bullets have come a long way, cut my groups in half yesterday. Delivers a lot of hurt down range on an unsuspecting critter. The VX-II 3x9 was a good scope at the time but after using my Viper HST on the 308 its got to go. Maybe after this season.

Ok, .082 drill fit, .086 didn't fit. Close enough. Tube AR15 length as you predicted, 98Z No divots in bottom of barrel for gas block. Before I pulled it apart, put a 6.8 oz buffer in it and loaded some rounds with a powder that has a little more chamber pressure but also a little faster burning. Started low worked up. Got higher velocities gun cycled flawlessly. Very nice groups. SD for 10 round strings approaching single digits when i got to the sweet spot. Tried some more of my hunting loads, back to the same problem. So long story short, longer tube, maybe an adjustable block, and Alliant AR-Comp powder and I think I should be there...

Thanks. I'll get the BAR off the bench and ready for hunting this weekend and then back to the Anderson.

18" barrel, M4-72 brake. Not the severe duty one.

Thanks, 98, plan on tearing it down soon and taking measurements you describe, I think I have a pin set around somewhere and know I have an index drill set. What hole size am I looking for?

Thanks, jtallen, for posting that. Trying to get all this clear in my head. Looks like for the Armalite sizes I would be correct in referring to my 308 gas system as Carbine or Mid, but not if I was talking DPMS or AR 15's

Good info, thanks. I had come across a couple of those threads earlier. I'm all over the dwell timing and pressure curves, been messing with different loads on auto loaders for some time now, but first for DI, other then my SP2A2, which functions flawlessly with 55 TO 78 Grain pills and several different powders. Don't think I found a powder that didn't work, more just tailoring loads for accuracy, fouling, and ease of dumping powder quickly in a skinny neck with that shooter. In fact, the more I think about it, this Anderson has to be the worst "out of the box" weapon I've ever laid hands on. And that's saying something! PS Where can I get actual tube lengths, example a Armalite 308 mid length = x, a carbine length = Y, Rifle length = z?

So 308 mid and carbine same?

What is the difference between mid and carbine length?

Great! Thanks for the info. 98, not sure if you're kidding, wouldn't be here if I didn't!

OK then... Thanks. My length would be the current tube length + the difference between the current end location and the center of the cut...Easy enough