Ben, find brass that meets the criteria below
1 - Factory round, pull the projectile and dump powder, confirm it fits in your chamber
2- case fired in your chamber, sized and fits back in your chamber
3 - case fired in your chamber, sized but does not fit back in your chamber
4 - case fired in your chamber and has not been resized yet
Then, for all of them, take the following dimensions and record it in a table. Record it in inches also, I.e 2.215”
A - Using the headspace comparator, measure from base to shoulder
B - case neck diameter,
C - case web diameter, measured at the 0.200 datum (if you don’t know what this is, Google it, but basically at a point 0.200 inches up from the base of the case.)
Once you’ve shared those dimensions, we can see where the issue lies.
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