phantom01231

Update: Ok so I went back out to the range yesterday after making some new hand loads. I dropped the charge in the rounds from 43 to 42 grains. World of difference. 90 percent of the issues are gone. I still had a few jams and some failure to lock open after the last round. Out of 60 rounds this only happened a few times. After cleaning her all up and inspecting her those issues seem to be mag related. One of my mags has a really soft spring. So I got some new mags coming that should take care of that. Bolt and related parts all check to be in good working order. The ejector looks like it has taken a slight beating from the whole ordeal so im going to order a new one with a spring to be safe to it appears everything is all good now.

Update: well I started cleaning up the brass for the rounds I just shot and had issues with. None of the case heads were torn but the did get roughed up enough that the would not fit into the shell holder easy. Also found marks from the extractor pin on the heads. Not so much dents but good enough you can tell it was there. Also it seems as if the case walls may have been over stressed as they were extremely hard to run into die. The factory ammo I shot looks brand new and resized like a champ.

Other than some cases getting bashed from the FTE everything looks kosher. Yeah I know its not the rifle at "fault". Like I said im gonna dial the powder back down and see what happens.

Im gonna dial the powder charge back down and see what happens. Ill keep you guys posted. Tripledeuce, I'm fully aware that a small base die and full length is diffrent. I use a case check guage on every round and haven't had one fail yet after resizing. not all dies are created equal. My full length seems to size just right where it needs to be. I do plan on picking one up however (small base) as I have another 308 in process and well not all chambers are created equal. But I will keep that in mind though about that being a potential issue. If it was though wouldn't I be seeing an issue with the round chambering vs failing to eject.

The brass was not new by any means. And im using full length dies. I would think that much powder would make a difference ethier but the cases was almost full with powder so!! I think thats what I was dropping im not sure like I said ill have to pull my notes out. Oh and 42ish to 43 ish is like max load in most books ive seen for my round

I was droping about 42.8 gr of powder I think and pushing around 2680 to 2690 fps. I dont have my charts in front of me right now but thats about ball park. Thats when the rifle would cycle with that round. I upped the powder to 43 and thats when it went to crap. As far as I can tell the rounds are not sticking and the bolt will lock injust fine. That im sure of. Everything is the same but the ammount of powder. As fas as what im pushing with the 43 gr of powder im not sure I havent had a chance to put it over the chronograph. Im thinking its overgassing but im just not sure.

Ok bare with me this might be a little long. I built my rifle about a year ago and have not had any issues with it untill recently. My rifle will shoot just fine with any factory ammo I can get my hands on. I've shot cheap 147gr junk to 168gr my wallet is now empty ammo and no issues. Ok so I recently started reloading. I worked up a load using some xbr8208, cci primers, 165gr Hornady sst, and ppu brass. The first time I took the ammo out to the range it worked just fine with no issues. With the hottest load I worked up the fps was still a little low so on the next batch I increased the charge just a little. (All of this was done over a chrono.) Now the second time I took it out with this ammo I started getting cycling issues. Mostly failure to eject. When the cases would eject a new round would not get loaded. I thought the issue with the ammo Was the crimp so I put a better crimp on the ammo and still nothing no change so I'm at a loss. Keep in mind that the rifle still works fine with factory ammo. Now yesterday I was at the range and I had the ammo and I let another guy with a carbine 308 ar try the ammo and his shot it just fine with no issues and mine still wouldn't. Any ideas! I'm thinking buffer and spring but I'm not sure. I'm using a 308 buffer and spring and tube from Fulton.

Naw the threads are fine. IMO they are a little to course of a thread to be used to keep that kind of presure back. Used the Permatex already thats how I got it to work. Im thinking Im just going to close up the adjustment hole with a smaller set screw and lock it in. Honestly I didnt notice much of a diffrence from having the GB set IAW the instructions and having it full open.

Found the issue. Not a problem with the ammo. First I tried some 168 gr and same thing happrned. What I found was apperntly when the barrel was turned down they did not go back and clean up the gas port so there was some flash blocking the hole. Got that cleaned up and there was a dramatic improvement. Still not 100%. Next I found that the adjustment screw on the block was getting blow by. I locked it down with tread lock and she worked just fine. But if I adjust the screw gas starts to leak and problem returns. Any ideas on what to use to seal it up and still allow for it to be adjusted. I was thinking high temp RTV. But other then that she shot like.a dream.

Wrong thread

They have gone from my phone to my facebook and now to my company computer and ive never bothered to change the file name.

Here is the rifle. Thought ya'll might like to see it.

Adjustable block wouldn’t be a problem being as I’m running one now. I am going to try a bit heavier load first. Ill run 50-100 rounds of that first. If that don’t cut it then Ill drill it out a small bit. My problem is I’m not or really don’t want to go out and spend 20 to 30 bucks for a box of ammo for practice when I get USA Surplus 7.62 for next to nothing. For a match or hunting then Ill spend it but other then that. When I start reloading that will be a different story. The better stuff I prefer to get a little at a time when I have a couple of extra bucks and stash it.

Ill give that a shot and see how it turns out. So far it seems to be breaking in good. The bolt and all has loosened up pretty good. At first it was real hard to charge it even soaking wet but not so much now. It kind of puzzles me because the DPMS LR-308 I had shot this same ammo right out of the box like it was cool. I have mags from Fulton. I didn’t see or notice any issues with them. The BCG Locks back just fine with them by hand. That was one of the first things I thought of. With the time I spent in the Corps I’ve had my share of mag issues lol. As I mentioned above though, is there a standard size for the gas port in the barrel for .308. Just looking at it and thinking about the mass that gas has to push back it does seem a little small. It was drilled between 5/64 - 3/32. Just seems a little small to me.

145 gr FMJ BT Privi Parzatain

I can't get a ruler in to measure but I would say it has about a good 1/4 inch.

the buffer and all had lube as well. When I say the thing was wet I mean it was wet. Now I did try the gas block at diffrent adjustments. I started all the way in to all the way out. I didn't have any thread lock/seal on the set screw. That wouldn't be the issue would it (gas leaking around the screw)?

Yes it was wet! Like a virgin on prom night! I had ultra bore dripping down the mag. The gas block was opened up all the way. only things I can figure is gas is leaking around the tube at the BCG Key but the fit there seems good. I also thought maybe the gas hole on the barrel might be under drilled. Any thoughts? Is there a standard size they should be drilled to?

Ok new here. I just finished my first .308 build and have an issue with cycling. With one round in the mag I can load and fire. When the BCG cycles it goes far enough to eject the brass but not lock back or feed a new round (if more ammo is in the mag). This is my setup. Mega Ma Ten set JP adjustable gas block SJC brake Fulton: Gas tube 22 inch barrel Chrome BCG & bolt Buffer, spring, tube, and Magpul PRE Stock combo The overall performance is more than i even hoped for. Rounds stack on rounds down range. I found no signs of gas bypassing or leaking around anything. Not sure whats going on. I know the block and gas hole on the barrel are lined updead on.