Any ideas on why I would get a blown primer with Hornady 308 red box 168 Amax tap? Rifle is a GAP 308 bolt gun.
Thanks
Thanks
Blown primer with Hornady Tap?
- Thread starter deersniper
- Start date
Not sure I will have to run a cleaning rod through it to check.
I had Gap build the gun back in 09 and let them choose the twist rate. I’m pretty sure it’s a tight bore Bartlien
If it shoots other brands of ammo with the same bullet weight without pressure signs, I suspect the ammo. Since you have had it for 10 years, I doubt it is a rifle problem. I might contact Hornady with your lot number to see if they have had any issues reported.
I know a major quality manufacturer had a problem with soft primer pockets on some brass a year so ago, so it does happen
Why are 2 primers different colors? Were there any reloads in the sleeve?
Strange looking fired primers? And over pressure signs.
Strange looking fired primers? And over pressure signs.
I had some regular Hornady match I was shooting too. Must have got mixed in when picking up brass.
I had about a thousand rounds of .308 Hornady match ammo, that I bought around twenty years ago. I hadn’t shot much of it after about ten years, when I ran across an old recall notice that covered my lot number. I contacted Hornady, they verified that my ammo was from the affected lot, and they replaced it without any problem.
I agree it looks like over-pressure with the ejector swipe and blown primer. Weird thing is, I'm not seeing flat primers, even on the ones with swipes. They all look well rounded to me.
Hornady says ammo should be good. I’m going to make sure the chamber and bore is clean and see if I have any more problems
Check to see if you have a carbon ring in the area from the throat to the lands. That will create pressure issues big time,
I started blowing primers with Hornady 108 ELD Match out of no where, after hundreds of round from the same lot without issue. Barrel had developed a nasty carbon ring and after cleaning it, no more blown primers. Now I spin an oversized nylon brush in the neck area with some Boretech every couple hundred rounds when cleaning the barrel and that keeps it under control.
This does sound a lot like a carbon ring. It seems from your second set of pics that you had primer leakage even from the match ammo. That’s where I would look first at least.
I had a well known hand-load of mine suddenly show pressure signs including heavy bolt lift and extruded primer strikes. Chronoed and saw much increased speed. This was from the same batch of 200 loaded rounds. Sure ‘nuff, I had a pretty stubborn carbon ring. Once I ground it out with a burr bit, all was good.
Just kidding about the burr bit part. It actually took quite a bit of scrubbing and cleaning to get rid of that particular gremlin. Afterwards, all was copacetic.
I had a well known hand-load of mine suddenly show pressure signs including heavy bolt lift and extruded primer strikes. Chronoed and saw much increased speed. This was from the same batch of 200 loaded rounds. Sure ‘nuff, I had a pretty stubborn carbon ring. Once I ground it out with a burr bit, all was good.
Just kidding about the burr bit part. It actually took quite a bit of scrubbing and cleaning to get rid of that particular gremlin. Afterwards, all was copacetic.
Just tried CLR today instead of Boretech. And... I’ll be using CLR from now on for keeping carbon rings away.
Before
After
Before
After
I haven’t had time to work on it but I would bet it is a carbon ring. I don’t clean often enough.
Have to break out the clr. That stuffs nasty. Hate working with it
Have to break out the clr. That stuffs nasty. Hate working with it
My buddy had this same.issue after 800rd of accurate, problem free shooting with a Bartlein 6.5cm gasser.I built. Started blowing primers and accuracy went to.shit. It was a carbon ring. After scrubbing that barrel.good it was right back to shooting great and.no.more blown primers.
I told.him to clean it before 800rd next time. Lol. He cleans it every 250rd-300rd now
I told.him to clean it before 800rd next time. Lol. He cleans it every 250rd-300rd now
I had the same exact thing happen to me a couple weeks ago. Same lot number as I’ve been shooting. Same exact marks on the brass from the ejector. It took a couple rounds for me to realize what happened when it stopped feeding and ejecting like it should. I ended up having a primer in the action and a piece of brass stuck on the ejector pin. I scraped it off, took the bolt apart (looked fine), cleaned it adding lube. Another box, same lot was fine. ??
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