.308 1st time fail...help please

[r3dn3ck]

1 thing jumped out at me from your description. You crimped the round. I suspect you buckled the shoulder area a little.

Load a few more rounds w/o crimp & try. You can remove the firing pin from the bolt to be safe.

Another possibility is you're not bumping the shoulder down enough during resizing. You need s comparator set for that.

this is my suspicion from my own prior errors. I've never had to crimp non-magnum bottle necked rifle rounds especially in a semi-auto. Not saying it's a bad idea but it's probably 100% useless since recoil isn't very sharp or heavy in a AR-10. Ditch the crimp step and set your bullets back just a tit.

[problemchild]

Looks like it works and reads same as my Dillon case gauge...what's the difference?

Gunsrruss, thanks for the die recommendation, I'll go that route if adjusting my die further down doesn't work out.

I have both and the round I showed in the video went in and out of the dillon gauge with no issue=fail!

The JP is cut to minimum sammi spec. The dillon is cut to who knows what.