Albroswift

Measured the tube, 12.75 from the front of the gas block. Meased the key, tube to common point, .365 engagement into the key. Measued the key depth, 0.925 but there seems to be a step or ridge at 0.817, probably where the final reaming stopped. So safely I would think the tube could engage the key 0.800, which equates to 0.435 longer by math, or 0.347 by wd40 tube measurement

Took a few measurements Put a wd40 tube in the gas tube and closed the bolt. .347 protruding Tried a couple times, similar measurements

Came from Anderson with whatever length their assembly dude put in, but they only sell carbines I think. Questions: How much longer should it be? Do I need to gauge the gas tube depth in the key? How far into the key should it go? I didn't take my chrony with me today, didn't have a lot of time and was primarily checking function, but the larger then normal group and the hot weather make me think my hunting loads could have been very slightly over pressured. I don't see any indication of that, no flattened primers or flow but that load was developed in 40-50 deg weather. Wouldn't explain the winchester ammo but maybe hot chamber, and I didn't have much of that to test.

One other thing of note (maybe) The jambs were not so crammed together tight as before, and the live round being chambered showed no where near as much bend/damage as before like the bolt was (maybe?) moving a little slower.

Ok, got some range time this morning 150 gr rounds, both handloads and factory, operated flawless 100%. Very nice group. Brass landed at around 11:00, before it was landing in the 10:00 position. The 180 handloads got worse, every 3-4 rounds or so similar jam as before and the group was poor. Had 10 Winchester 180's left, same results. It was in the low 80's this morning, been hot all week. So: With the original light recoil assembly light and heavy bullets jamb 1/10. With the new heavy recoil assembly light bullets work great heavy bullets jamb 1/4 I have no problem just shooting 150's, but like to know why the hunting rounds dont work.

Dang, range closed for biathlon. Changed out the bolt catch, the dremmel grind I did looked like dung. RM promised me the range would be open next weekend.

Yes, EA1095 spring, VLTOR Tube. Thanks again for all the help. I should be able to get out this weekend. You all can get back to the testicles/mancard discussion if you like...

Sir yes sir...

Ok, back to ME... heavy buffer installed, first just dropped buffer and bcg into extension without spring and took a couple photos of clearance. Appears bcg clears ears at full recoil by .100 and clears stop by .200 (eyeball gauge, not caliper or feelers) Am I getting close enough for some more range time? Please?

Making your day made my day Hit the range 0900, couple guys already downrange setting up so i grabbed a couple bords and a pack of shoot n see targets and we got down and were ready to shoot (imagery first) throwing rounds down range by 9:15 By the second ceasefire there were at least 10 black guns in 223 on the line, nothing else. Never seen it like that before, usually only 4 or 5 shooters various calibers. Like everyone saw this thread, thought hell, hunting rifles dialed in, 308's on the bench awaiting parts, wait a minute, back of the safe... !

Partners SP1 and my SP2

Guess I'll wait till next weekend, thanks for the heads up. Buddy just showed up with a like new SP1A2 1977 serial # so all is not lost tomorrow! Back to the Mojitos

10/4 on the Anderson, bunch of mis matched parts tossed together on a Friday afternoon and poor fitting since day one. Got a deal on it anyway Used but unfired in box and learned a lot of what not to do on a build.

Thanks again guys for all the help 5 oz buffer didn't show up yet, but the 3 oz armalite did so have a place to start. Let you know tomorrow the results.

Ready for some range time tomorrow

Speaking of slamming into the ears...

Thats one of the ones i have coming Thanks!

Have a 5 oz and a 4 oz coming, just asking! So is it the chance the bolt would travel too far rearward that makes the shorter buffer a problem?

Question on buffers, with the 7-3/4" VLTOR tube and the EA1095 spring, do I need the 3.25" buffer or will the 2.5" buffer work? Thanks

Here you go...

What can i say, im a weak man... And my friends don't help either!

Problem is that's when the boys in blue want to join the party. Im running out of excuses for the loud bangs in the back yard...

Drinks are flowing and the bbq smoking probably not going to be spinning the tumblers on the safe, photos will probably have to wait Maybe tomorrow!

Thanks Matt, that's where most of this information seems to be pointing and it makes sense. I have the longer tube and spring on order so that should give me some more direction. When you say a heavier bolt carrier group, could/would you include the buffer weight in that calculation? PS great forum, I don't think I have ever received this much help on the interweb EVER!

One time I dropped the mag, pulled the spent case, live round finished chambering. Most of the time however it is too deformed and if I let it try to chamber it gets moderately stuck, but, the extractor is engaged and will pull it back out. If I pull the bolt back first, then drop the mag, the live round is not extracted but will pull out with fingernail.