CatFood

Thanks all, and thanks again for the help!

Holy smokes I needed to bump my old thread. And to give an update of this ar6.5 build. Well she is functioning flawlessly! The H3 buffer did the trick! Had to adjust the gas a bit again but got it dialed in. Shot irons for a bit, but decided to rob the 308 bolts scope. Went with a aero mount, won't make that mistake again. Kept coming loose even with properly cleaned, dried, and cured blue loctite, a few range trips. In a final ditch effort, red loctite went in. The verticle type of rings suck when tightening the mounts. Shot and functioned great with the 120's and 147g. Loved the 123g or I had the best groups with them. I have a bunch of ladders reloaded, just need some time to test them out. Ditched the whitt machine muzzle rise eliminator for a ultradyne brake. What a difference that made! Also cleans up the front end look too. Thanks everyone for the help. Didn't mean to disappear, life happened and a bunch of crap changed. Still in a crappy position, but working my way through it the best I can.

Great post Al!

Awesome that is good to hear about the twist rate. Yep I note everything down of importance.

I'll keep my eyes peeled for some 147's (when I have coin). I'm assuming they work good in a 1-8 twist barrel? I have some lighter weight ammo to test as well (prime 120, hornady 130 all factory I'm a bit fuzzy on the weights) bought a box each almost a year ago 20 rounds each. But when I tested the build I was using 140gn hornady eld American gunner, it shot extremely well. Got to find a note pad to write all this info down lol.

Sweet, yes been reading about the many different characteristics of the various projectiles in the 6.5 range. Same with the 9mm and 223/5.56. I hope it doesn't take to long to settle down, or at least the avaiabality of reloading stuff. It also gives me some time to save up some coin.

The H3 arrived late last week, and today I scored 2 boxes of 6.5cm. So I can go to the range to test a bit more. Also checked headspace on the jp hp bolt I have and it's all good. I just hope I can get it all dialed in with those 2 boxes of ammo. I don't have the cash to buy anymore ammo. It's insane how much they are charging for ammo.

I have not yet, depends if the barrel was built on a Monday or Friday lol. I'll locate some numeric wire drill bits to check. Though I don't think the gas port size is a issue as it does lock the bolt back on every last round. But my OCD is killing me so I'll check anyways lol. About middle of the days range trip I was dicking around with closing the gas port, 2.5 turns caused the bolt to not lock back or pick up a round. Thanks for always helping/commenting on my posts. Glade @Albroswift sent me over here for this build. Rad place for sure.

Gas port size is .073" according to ballistic advantage.

A H3 buffer. Some NAR stuff- tq holder, emergency trauma dressings and some gauze. G-code micro chest rig that will never show up. Been a damn month and it still hasn't even been shipped, they won't even reply to my emails. All I get are automated order reminders of it has been X weeks since you ordered.

Just craped myself! Found a somewhat local range (2 hours away) that has a 1000y range! Holy smokes, thought I was stuck with 200-300 yards. It's the same place I did my appleseeds at! Whoot. Cali tactical academy, never shot there besides the appleseed. Anyone in socal shoot there? I can't tell you how happy I am to find this out! On a good note, I sold some ski gear so I have the $ to get a true H3 buffer with some left over for ammo if I can find it. I needed the H buffer in my other rifle now. Phew. So it all works out for now. The range trip is postponed for a bit more as this wind is insane, then back it up with possible rain for a week. Good news in that part, reduced fire hazard.

Word! I'll remember to toss in the buffers / weights I have to adjust if needed. I'll also reset the gas block to full gas. Now that I think about it, I was getting a hard recoil impulse when shooting it. This challenging puzzle is quite fun if I say myself. 😀

Rock on @98Z5V yep had a H buffer sitting around so tossed in 2 tungstens, though they are heavy buffers so they are a hair heavier. 5.57oz is as close as I can get. I was a bit worried about those shavings (steel ones) as I was like oh snap....wait.... lordy. But I'll toss this buffer in and attempt to get out next week to test more. If this all works out then a h3 will be ordered. Not going to touch anything else on this except replace some horrid titanium take down pins. Thanks for the help, will post up with updates.

I don't have a h3 buffer, but I have a ton of weights I can play with to get around 5.4oz. I don't know when I'll be able to get out to shoot again, but I'll try to get out next week. Huge wind event here for the rest of the week. Slowing down the bcg to much I'm guessing? The shavings in the barrel extension were both brass and steel. Steel was from the bolt lugs. There was a ton more brass then any of my newly built ar15's but I expected that. Time to hunt for more 6.5cm ammo. Thanks again for that info @98Z5V

@98Z5V Thanks for the input! Recoil system is as follows: Heavy buffers XH carbine buffer 8.6oz, 3.25" length, vseven a5/308 receiver extension 7.75" depth, armalite 308 spring 13.5" length. Issue was from 1st shot to end of day (gas block fully open at 4.5 full turns) final turns 3.75 at end of day. Followed SA's instructions to a T. Mushed case happened every mag at least once or twice. Gas: Salient arms adjustable gas block .936", rifle length, 22" BA barrel, aero bcg. Edit to add I dont know the gas port size. I had to really yank off the cartridge from the bolt face. I'll add pics of the case face. There was a really sharp edge right under the extractor that was hanging the case up. Bolt locks back every time the mag is empty. My mistake was not getting a pic of the issue. Any idea on the bolt lug marring? There was tiny metal shavings in the barrel extension when I was cleaning it. First 2 pics are from munched case (ejector mark, and extractor mark) rest are from a normal ejection (ejector, extractor and deflector marks)