Here is an update.

The Redding neck sizing die arrived as did one of the new bushings. Loaded rounds at the neck measure 0.250", the collar that showed up is the 0.249" so I went to work with it. I loaded 10 rounds with only neck sizing and 24.5 gr of CFE223, 10 rounds the exact same way plus a light Lee factory crimp applied. and 5 rounds neck sized as the first ten but with 25 gr of CFE223.

All shot bugholes with one flier that was me in each group. The last group chrono numbers were amazing. 2830fps, ES of 14.5 and SD of 5.38. I checked and I've loaded these into the lands a few thousandths. Now, I just need to see if this is repeatable and if I've cured my case head failures.

I love this stuff.