Sticky bolt

[n10sivern]

I'm going to check it with feeler gauges in the morning and see if it is a clearance issue causing primary extraction failure.

[northlander]

Correctly resizing belted magnum cases can be tricky. Most loading dies have a hard time bringing the belted cases back to original specifications. You mentioned using quite a bit of once fired brass. Because this once fired brass was fired in some other guns chamber the first time some of it may be quite a bit oversized. Look at the brass that is sticking, does it show scuffing about 3/8" to 5/8" in front of the belt? If so your loading die is not getting the brass small enough for the Criterion chamber, thus these cases will stick.

I do not remember the name of the company that makes the collet die sizer for the belted cases but the ability to properly resize belted cases has been their claim to fame.

Jim Briggs
NSS