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Posted: 5/26/2014 5:11:47 AM EDT
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I bought a PSA 14.7" midlength upper a while back. Since I bought it, it has ejected cases to the 1:30 position. It also hits the deflector in a strange way, seeming to catch low on the deflector, near the machined opening and then hitting again near the "point". I started with a carbine buffer. I then tried a H buffer, a Spike's T2 (weight in between a H and H2) and yesterday I tried a Spike's T3 (same weight as a H3). There is no change to the location of the ejection with any of them. Just before I went home, I decided to try some Wolf steel-cased ammo as a low-powered ammo function test. Function was still 100% as it has been all along, but now the cases were ejected to 4:30.
I started with a PSA BCG and switched to a Spike's BCG soon after. No change with either. I started with a 6061 buffer tube extension and switched to a 7075 one (with new spring) and no change. So, is it still over gassed? Should I try a different spring? Or should I just not worry about it as it functions 100%? This will be hard to do with my OCD 
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You can try a heavier spring or buffer, but if it's functioning 100% then I would leave it. Changing the buffer tube made me  unless it was just because you wanted to go to 7075 for some reason.Yes, I didn't know how good (or bad) the quality was on the one I had installed, so I switched it out to a known one. The only reason I listed that is that it included a spring swap, which I thought would eliminate one variable of the original spring being weak. |
| You didn't say what ammo was ejecting at 1:30, so I presume it is quality stuff. If you are getting consistent ejection with brass and steel ammo, there is no need to muck about any more. I would go back to the H buffer if it works and pay attention to ejection as you get more rounds on the rifle. |
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You didn't say what ammo was ejecting at 1:30, so I presume it is quality stuff. If you are getting consistent ejection with brass and steel ammo, there is no need to muck about any more. I would go back to the H buffer if it works and pay attention to ejection as you get more rounds on the rifle. Yes, sorry it was XM855 and a little Federal .223. |
| Once again, I wish that ejection pie chart would go away. It is actually meaningless so long as your rifle cycled properly. If your spent cases are hitting the deflector then your ejection is not at 1:30. Your bounce off the deflector goes to 1:30. If you are getting 100% ejection then all is good. |
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As long as it is ejecting with good force, I wouldn't worry about it. I have never been concerned with where my firearms eject unless they are smacking me in the face or dropping hot brass on my arms, chest, or neck.
I have exactly one rifle, out of many, that I have worried about ejection, and that is only because the ejection was poor, at about the 3 to 1o'clock position with minimal force, and some rounds that would not eject at all. Usually the last round fired. The bolt would be locked back, and I would look in the breach area, and the last spent case was sitting on top of the magazine follower. If your gun is working fine, I wouldn't worry about all of the mall ninja bullshit. |
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Sounds like heavier spring and/or adjustable gas to get where you want.
Another possibility is Tubb’s makes a carrier weight system that can add a significant amount of weight. For a HD/SHTF weapon caution is generally advisable, but otherwise playing with this stuff can be a lot of fun. |
| What the heck are you trying to accomplish? Your just wasting time on where your ejection pattern is and forget the stupid chart. Use your H or H2 buffer and be done with it. If your weapon is cycling, ejecting and extracting then its fine and dont worry about it just use quality ammo, magazines and keep it lubed. |
| Using the same ammunition some of my AR's eject and hit in the same place as yours does, mostly Colt AR's. Others hit at various point on the deflector. I wouldn't be concerned about it. No matter where they hit it will eventually wear the finish off unless you protect where they hit. I use a small price of velcro to protect the finish. |
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Quoted:
I bought a PSA 14.7" midlength upper a while back. Since I bought it, it has ejected cases to the 1:30 position. It also hits the deflector in a strange way, seeming to catch low on the deflector, near the machined opening and then hitting again near the "point". I started with a carbine buffer. I then tried a H buffer, a Spike's T2 (weight in between a H and H2) and yesterday I tried a Spike's T3 (same weight as a H3). There is no change to the location of the ejection with any of them. Just before I went home, I decided to try some Wolf steel-cased ammo as a low-powered ammo function test. Function was still 100% as it has been all along, but now the cases were ejected to 4:30. I started with a PSA BCG and switched to a Spike's BCG soon after. No change with either. I started with a 6061 buffer tube extension and switched to a 7075 one (with new spring) and no change. So, is it still over gassed? Should I try a different spring? Or should I just not worry about it as it functions 100%? This will be hard to do with my OCD Try a Sprinco "Blue" action spring with the H buffer and report back. 
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Are you getting some pretty good dents in the spent cases from ejection? I had a severely overgassed upper several years ago. When shooting from a bench the rounds would basically flop onto the bench top at the 1:00 position. Not even eject off the bench. I swapped several bolts, carriers and buffers to troubleshoot. Nothing seemed to help. I finally installed a Sprinco RED spring and an H3 buffer which finally helped some. The final fix for me was using a Young chromed BCG. For whatever reasons which are not clear the Young BCG really helped over any other BCG.
I was getting some pretty good dings in my brass from the hard ejection. I suspected rather than hitting the deflector the brass was hitting the rear of the port opening(sharp edges) causing the dings and being knocked forward. After all the changes most ammo ran at around 3:00 with lower powered steel closer to 5:00. |
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Thanks for all the replies. I might try a different buffer spring to see if that does anything. If not, I guess it is what it is! For the record, the cases eject about 8 feet away in a consistent pile. I doubt you'll even notice ejection pattern if you find yourself on a two-way range...... 
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If brass deflects off the corner of deflector, it will have slash dents in the middle, and will fly in the 1:00 o'clock direction.
Such pattern of ejection that almost cuts the brass in half should not be advocated by "if it goes bang, don't worry" and "that stupid chart" crowd. 
Photo above: spent brass from Noveske N4 Practically all rifles eject somewhere between 4 -5 o'clock; brass deflects off the flat part, or the tip of the deflector, not the corner. In few cases brass will hit the flat part of deflector and still fly forward, but will not be cut in the middle. Such ejection is OK. Try Sprinco blue recoil spring with H2 buffer. Don't use stiffer springs than Sprinco blue, for they slam the carrier home with too much force. Dump the extractor o-ring. You may have to play with different extractor and ejector springs to tune your ejection. Don't bother with set screw adjustable gas tubes or gas blocks, screws loosen up and don't hold position. If nothing helps, buy new barrel with proper gas port. You can always sell the overgassed one at discounted price to "if it goes bang" advocate. P.S. the tips I posted above do work on moderately overgassed rifles, but do nothing for my heavily overgassed N4. |
| My PSA rifle does the same thing as the OP's. The casings are hitting the back of the ejection port and are thrown slightly forward. Every one of my casings has a small dent in it but as long as the rifle runs 100% I really don't care. I started out with the CAR buffer and switched to an H, but that didn't make a difference. |
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My PSA rifle does the same thing as the OP's. The casings are hitting the back of the ejection port and are thrown slightly forward. Every one of my casings has a small dent in it but as long as the rifle runs 100% I really don't care. I started out with the CAR buffer and switched to an H, but that didn't make a difference. It either fires and cycles or it doesn't: that's the only distinction that matters.
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