Not really.
Watching this for a few days, I've noticed that everybody seems to be seeing Zebras. When you hear hoofbeats, think of horses...not Zebras.
So, the gun usually goes to battery and sometimes it doesn't...so it seems that it's well set up or it would fail much more often and it would fail randomly and not at the one point that you're most likely to get a failure to go to battery...and it doesn't do it every time. That suggests a variable.
There is only one variable not eliminated.
The ammunition.
Take the barrel to a gunsmith and have him drop a finishing reamer into the chamber. Unless I miss my bet, he'll get chips from the forward third, where chambers tend to get tight when a reamer shrinks after two or three resharpenings. Chamber reamers are expensive. Manufacturers resharpen them several times before tossing them. This is very likely whence the bug nests.
Yep - I had to do this to one of the 3 Springfield Loaded 9s I have. You can rent chamber reamers pretty cheaply. Try using your barrel as a case gauge on 100 or 200 rounds and see if any don't drop in (your current/working ammo, and what you were shooting when you had the problem, if it was different - and it could have just been a different lot). It's quick and free to test, and you'll know if there is a potential problem there and can choose to fix it or not now.