What caused this?...LR-308/ammo question

Have you checked the head space? That would be the first thing to do. 7.62 head spaces a few thousandth different than .308, be sure and use the correct gauges for your chamber.
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Again he has a .308 chamber not a 7.62X51. He was using the correct ammunition for the rifle. If other brands of .308 ammunition functioned correctly in his rifle I doubt it is a headspace issue. I still beleive it is a ammunition problem, he might have had under charged or over charged powder loads, or oversized primer pockets.

The bullets ogive might have been engaging the lands like one poster suggested which can jump the pressure up as well and cause some of these problems. Unfortunately the OP shot up all the ammunition so he can't put a caliper to it and measure it against the other Federal ammunition he shot as well. He can however compare his fired cases with a caliper to see if they measure any different.

His best bet would have been to stop shooting the Winchester ammo as soon as a primer blew and ship back the unfired ammunition to Winchester to find out what the problem was. I would still contact Winchester and see if they want the fired cases back to inspect. Who knows they might have had a bad run of ammunition that they need to recall.
 
Thanks for the info guys!!, next time ill know to stop with the first misfire. I am just not use to have this kind of problem. I come from 20yrs of shooting trap and skeet and reloading 1000's of shot shells but honestly this is my first centerfire rifle. Never have I seen something like this before.
 
In my experience, commercial ammo usually is not crimped sufficiently and with soft point ammo sometimes the bullet is set back into the case as it hits the feed ramp or the magazine lip, causing a spike in pressure and blown primers. Run the ammunition through something like a Lee Factory Crimp die and try it again.
 
Quote:
Have you checked the head space? That would be the first thing to do. 7.62 head spaces a few thousandth different than .308, be sure and use the correct gauges for your chamber.


Again he has a .308 chamber not a 7.62X51. He was using the correct ammunition for the rifle. If other brands of .308 ammunition functioned correctly in his rifle I doubt it is a headspace issue. I still beleive it is a ammunition problem, he might have had under charged or over charged powder loads, or oversized primer pockets.
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It could very well be ammo related but until you physically check the head space you are just guessing. It takes ten minutes to check and then you have a positive answer.
 
Not the first time

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If you look close, every primer leaked.
 
i just had this happen the other day it scared the crap out of me

the other day i went shooting with a couple of buddies and shot off 50 rounds of hand loaded 308 rounds out of my savage model 111 bolt action and i had a 20 pk of winchester powermax and thought i would try it out to see how well my gun liked it and after the first shot i told my friend that they felt hot and that they packed a punch they felt hoter than my hand loads which were already pushing 3000 fps with a 165 grain hornady bullet after a 3 shot group which grouped a 3/4 inch moa at 100 yards i went to fire another group and this time the shot was a hell of a hot one and i definitely felt it in the recoil and when i went to to eject the shell the bolt had stuck shut so bad it took 2 people to open it well i fired a total of 7 rounds and 3 had blown the primers and i instantly stopped shooting and called winchester the next day and they asked me to send them the rest of the ammunition so it can be tested i also expressed my concern about my guns condition after having that happen so they asked me if i would like it seen by a gunsmith or the dealer savage arms said that they are going to do a full inspection on the gun they said that they will fix the problem at no charge if its the gun and if its the ammo winchester will repair the gun through savage which i will send it out to savage in the next few days and i will post the results when i find out all and all i would highly recommend not to use this ammo its not worth your safety and your life i know this thread is old but i hope this info can prevent someone from getting hurt or killed DO NOT USE THIS AMMO IT IS DANGEROUS!
 
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