New rifle 30-06 misfires and shoulders blown forward - a lot!

[Clint M]

I supposed your may be correct that was just a guess on a roughing reamer run in to far. All these are guesses, if we could get the OP to give us some measurements we might turn it into a game LOL. All said and done Winchester will take care of the problem, and he will have a fine 30-06 when returned. I wouldn't trash the manufacture for this as crap can happen, and no harm was done, nor does it look like it was even close. The owner is out of a little time, however he may be reimbursed with a hand picked barrel and a good going over of the gun by the manufacture.

Please let us know if Winchester gives a reason for this, I doubt they will, but it has a lot of people wondering.

 

[amflyer]

Shoulder and neck diameter looks a lot like a 338/win mag. Would the body of the case flare more if a 30-06 was fired in a 338 chamber? Maybe not if the bore was 338 also.

 

[Float Pilot]

The cases in the photos not only have a sharp shoulder, but they also appear to have a new case mouth diameter which is much larger than 30 caliber.
The big claw extractor of a Model 70 might hold a 30-06 case in a 338 Win Mag chamber so that the firing pin could be struck.
It would be ammo brand picky and that might explain why some of the Remington ammo did not go off.
Even a heavier bullet would explain why some ammo might go off and others not. A heavier slug would mean that the firing pin would make a deeper dent on a loose case floating in the over-sized chamber.

 

[farmerboy78]

If it were a .338 chamber I would think that the case wall would have failed since there wasn't any steel near it to hold it steady

 

[Joshua M. Smith]

OK, nothing to add... just tagging!

 

[JFtheGR8]

Winchester / FNH would have no standard tooling on the production line to finish ream such a chamber. (But especially not with a drill bitt.)

Rc

I said drill bit because the the shoulder angle isn't sharp and looks an awful lot like drill bit tip geometry. If a barrel blank goes into one CNC lathe and comes out finish machined then there most definitely could be a drill bit in the tool carousel. Just guessing like every other poster here because I have no idea how they have set up the steps for their manufacturing process. Either way a defective barrel left their facility and I'm sure they'll make it right.

 

[Doc7]

OP - is there any way you are going to measure the cases and post results? With either answer, folks could save time on the conjecturing...

 

[Art Eatman]

It looks to me that what we need is for the OP to start a new thread when the problem is resolved.