I have been shooting and reloading for a DTA SRS .308 16" factory bbl. I am only in the mid-hundreds on this barrel. I started with factory-loaded LC brass and after first firing only neck-sized the brass. I'm now into my second reloads on that brass.
On my last batch of reloads I fed a round that I couldn't get into the chamber, and actually had to tap out with a rod. I pulled out my Wilson .308 case gauge and discovered that round as well as about a third of the reloads were no longer in spec!
I kept shooting the ones that fit the case gauge, and had a lot that were hard to close the bolt on. Then another one got stuck and had to be tapped out.
Now the barrel won't chamber <span style="font-style: italic">any</span> .308 case that passes the Wilson gauge, including:
<ul style="list-style-type: disc">[*]Brass originally fired in it and neck-sized only[*]Factory rounds[*]Small-base full-sized cases[/list]
This is even after scrubbing and inspecting the chamber and throat area as best I can. I don't have a bore scope, but it looks smooth and clean.
What could be going on?
(NB: I haven't seen excessive pressure signs on any round fired in this barrel.)
On my last batch of reloads I fed a round that I couldn't get into the chamber, and actually had to tap out with a rod. I pulled out my Wilson .308 case gauge and discovered that round as well as about a third of the reloads were no longer in spec!
I kept shooting the ones that fit the case gauge, and had a lot that were hard to close the bolt on. Then another one got stuck and had to be tapped out.
Now the barrel won't chamber <span style="font-style: italic">any</span> .308 case that passes the Wilson gauge, including:
<ul style="list-style-type: disc">[*]Brass originally fired in it and neck-sized only[*]Factory rounds[*]Small-base full-sized cases[/list]
This is even after scrubbing and inspecting the chamber and throat area as best I can. I don't have a bore scope, but it looks smooth and clean.
What could be going on?
(NB: I haven't seen excessive pressure signs on any round fired in this barrel.)