flyfishrman Posted December 7, 2011 Report Share Posted December 7, 2011 Ok, you guys were a great resource when I was looking at triggers so I thought I'd bounce another one off of you. Since I'm using my gun mainly for hunting I decided to just start running standard .308 hunting cartridges. I went through a several different brands before I settled on Hornady Superformance 150 grn SST. It is really nice and accurate with that round. However, it really doesn't eject these very well. The box says these are 3000fps rounds, not sure how that compares to surplus 7.62x51 rounds, but when I fire the Hornady's they eject clear and allow the next round to cycle fine but it literally ejects the casing just a couple of inches away from the gun, they almost just roll out. No FTE or FTF's, but it doesn't seem right. Is it just the round or is there possibly another issue? Maybe the gas tube isn't blocked well? Let me know your thoughts. As I've mentioned before I'm new to this platform and learning so your insight is greatly appreciated. Quote Link to comment Share on other sites More sharing options...
imschur Posted December 7, 2011 Report Share Posted December 7, 2011 Have you shot any other ammo? Quote Link to comment Share on other sites More sharing options...
flyfishrman Posted December 7, 2011 Author Report Share Posted December 7, 2011 Have you shot any other ammo?Sure have, shot 7.62x51 surplus ammo and it would eject fine, but had trouble feeding the next round. I know these barrels can be tight from what I've read so I moved to .308 since I was going to hunt with that anyway. Shot several Winchester loads and some Federal before settling on the Hornady. Noticed sluggish ejection with the Hornady, but as I said it is spot on accurate and feeds just fine. Quote Link to comment Share on other sites More sharing options...
imschur Posted December 7, 2011 Report Share Posted December 7, 2011 Sorry I was multitasking and misread what you wrote. A very well known 308 AR rifle builder sent this to me once.Many people think that just because some factory makes a round in their caliber (say 308 or 7.62), it should function in any rifle. Nothing could be further from the truth. There is a very wide range of internal ballistics on all this ammo and it is not realistic to expect that a self loader will function with any round out there. Weapons designed for military applications assume that they will use military grade ammo which will in fact fall into a relatively narrow range of specifications, both dimensionally and in terms of internal and external ballistics. So it follows that you can have a fixed gas system that will deliver a specified reliability requirement as long as you use the required ammunition. Quote Link to comment Share on other sites More sharing options...
alelks Posted December 7, 2011 Report Share Posted December 7, 2011 For us old farts that need reading glasses. <lmao> Many people think that just because some factory makes a round in their caliber (say 308 or 7.62), it should function in any rifle. Nothing could be further from the truth. There is a very wide range of internal ballistics on all this ammo and it is not realistic to expect that a self loader will function with any round out there. Weapons designed for military applications assume that they will use military grade ammo which will in fact fall into a relatively narrow range of specifications, both dimensionally and in terms of internal and external ballistics. So it follows that you can have a fixed gas system that will deliver a specified reliability requirement as long as you use the required ammunition. OOPS! you fixed it already. Quote Link to comment Share on other sites More sharing options...
imschur Posted December 7, 2011 Report Share Posted December 7, 2011 <laughs> Quote Link to comment Share on other sites More sharing options...
alelks Posted December 7, 2011 Report Share Posted December 7, 2011 HaHa! That text was so small it looked like thin lines. Quote Link to comment Share on other sites More sharing options...
washguy Posted December 7, 2011 Report Share Posted December 7, 2011 Hiya FlyHave you tried putting one shell in mag.. firing and then seeing that the bcg locks back ?Start there...if it short strokes,and doesnt lock back...look for a gas problem first...get back with us ...also if its new or fairly new you gotta run em really wet ! Wash Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted December 7, 2011 Report Share Posted December 7, 2011 +1 for running it sopping wet, the only time i had a similar issue, i sprayed it with some more lube and was gtg <thumbsup> Quote Link to comment Share on other sites More sharing options...
Retired JM Posted December 7, 2011 Report Share Posted December 7, 2011 Agree with running it wet; BCG should get a generous amount of lube, but not to the point you're getting spattered in the face with hot lube. Does the problem occur with all your mags or just one in particular?After lubing it and the problem persists, check for a canted/loose front sight base (FSB). This would limit the amount of gas vented down the gas tube. Also check the carrier key for looseness, this would cause a gas leak. Finally, check the buffer/buffer spring - something may be causing the buffer spring to bind or you might have to heavy of a buffer.HTH,RJM Quote Link to comment Share on other sites More sharing options...
flyfishrman Posted December 9, 2011 Author Report Share Posted December 9, 2011 Ok, just got back in town and had a chance to check out your replies. I'm going to give the suggestions a shot and report back. Kind of tough to shoot alot right now because I sight my rifles where I hunt and the big boys don't like alot of gun fire! ;D I did pick up some Mobil 1 to soak my BCG in to help with lubricity. I don't have it running too wet right now so I'll immediately give it a bit more lube prior to my next trip out. I'll let you know how it goes. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted December 9, 2011 Report Share Posted December 9, 2011 Sure have, shot 7.62x51 surplus ammo and it would eject fine, but had trouble feeding the next round. I know these barrels can be tight from what I've read so I moved to .308 since I was going to hunt with that anyway. Shot several Winchester loads and some Federal before settling on the Hornady. Noticed sluggish ejection with the Hornady, but as I said it is spot on accurate and feeds just fine.How did the Win & Fed function ? Whats the round count of the rifle ? The Hornady SST is a powerful round , should function fine ,normally .You will like what the SST does to game animals . I custom load it for a bunch of Hunters. Quote Link to comment Share on other sites More sharing options...
flyfishrman Posted December 10, 2011 Author Report Share Posted December 10, 2011 How did the Win & Fed function ? Whats the round count of the rifle ? The Hornady SST is a powerful round , should function fine ,normally .You will like what the SST does to game animals . I custom load it for a bunch of Hunters.The Winchester and Federal did fine, but they weren't grouping like the Hornady. Round count I can't confirm because I bought the gun used, but it honestly didn't look like it had been shot at all really. A buddy owns the gun shop and he said the previous owner bought it and put it in his safe. The overall round count is low for sure, I've only put around 60 rounds through it. As far as what the SST does to game, I hope I find out. Been a slow season thus far! Quote Link to comment Share on other sites More sharing options...
washguy Posted December 10, 2011 Report Share Posted December 10, 2011 So Fly.... did you put a single sst in and see if it locks back? Wash Quote Link to comment Share on other sites More sharing options...
survivalshop Posted December 10, 2011 Report Share Posted December 10, 2011 Lube it up & find out how the Honady works . Sounds like new rifle needs to be broken in . If you fired the Win . & Fed. first , slight fouling & not enough lube on a new rifle could cause slow action response.I agree with the above , clean the rifle , lube it up good & then try the Hornady . See if it does lock the bolt back . Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.