White Box M80 ammo

[yfarm]

Bought some WW white box M80 ammo at Walmart for plinking.
Shot 2 rounds out of a Ruger American 308 and both rounds locked the bolt, had to force the handle up and back to remove the fired casing. Fired a couple of other brand rounds,normal rifle function. Repeated process with a Encore 308, no extraction except with range rod, even fired casing wont extract from either rifle, other ammo works fine. Assume ammo problem. Thoughts?

 

[Mikido]

I have m80 that for the most part requires a decent bang on the way on up on the bolt more times than not. I’m several hundred rounds in, don’t see an issue really

 

[Montucky]

Is M80 7.62x51….? Could be running hotter than .308win,…..curious

 

[Montucky]

Looks like you’re shooting 7.62x51 out of a 308win bolt gun. Risky Business….pressure spikes are expanding brass for heavy bolt lift. I would discontinue using it in those rifles…..that ammo is designed to feed an AR10

 

[Montucky]

You pushed those rifles to their max tolerance but I’m sure they’re alright….

Also Note: never shoot 5.56x45 out of a .223rem chambered bolt gun. Unless you’re handloading & calmed the powder charge down for the 5.56 brass

 

[Montucky]

I’m honestly suprised that Winchester is selling 7.62 ammo that would pressure spike in a .308 win bolt gun in current times with Lawsuits etc……

 

[grfox92]

I just shot a box of that out of my RAP in 308. Zero issues mechanically but it groups like absolute garbage. 2.5" at 100 yards.

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[Mikido]

That’s pretty good for m80….

 

[IALoder]

That’s pretty good for m80….

Beat me to it!

 

[Mikido]

Lol dead target every time

 

[grfox92]

Beat me to it!

I didn't know what to expect to be honest haha.

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[Mikido]

M80 is good stuff. .65/round. You get reliable enough target practice, with brass to reload.