Took my brothers new build out to the range yesterday. Shot well but notice that we had to use the FA several times on mag changes. Went to clear the rifle on a cease fire and had to motar the charging handle to get the round out. It pulled the bullet, powder got everywhere, and had to clear the bullet with a cleaning rod. Decided to hang it up for the day until i could get some chamber guages, but checking the bolt face depth it looks like i might have found the issue. At least i hope.
We put an underground tactical type2 bolt in it; barrel is an Alexander Arms 16" lite. Face depth on bolt using a dial caliper is .134" or so. I'll try a depth mic on it tomorrow at work but i'm thinking that .002" or so could be enough to cause this on a long for tolerance round. Ammo was hornady black btw.
Also notice the case necks were dented on the end of the case opposite the ejector marks. Maybe over gassed? Maybe related to the headspace issue? I'm using a spikes t2 which did good in my grendel.
Here is some pics. Second one is the bullet removed showing the marks i think the rifling left on the round. That ring on the nose is from the cleaning rod.
What y'all think? Am i missing something? Still buy guages?
We put an underground tactical type2 bolt in it; barrel is an Alexander Arms 16" lite. Face depth on bolt using a dial caliper is .134" or so. I'll try a depth mic on it tomorrow at work but i'm thinking that .002" or so could be enough to cause this on a long for tolerance round. Ammo was hornady black btw.
Also notice the case necks were dented on the end of the case opposite the ejector marks. Maybe over gassed? Maybe related to the headspace issue? I'm using a spikes t2 which did good in my grendel.
Here is some pics. Second one is the bullet removed showing the marks i think the rifling left on the round. That ring on the nose is from the cleaning rod.
What y'all think? Am i missing something? Still buy guages?
Comment