This looks about right after sizing.Measure the case body just behind the shoulder, chamber should be .363"
These measure .335"Fired necks should be about .329" with a tight chamber neck and about .332" with a large chamber neck, I've seen them all around that area.
Yep. I'm dumping the 4198 as we speak and grabbing a jug of RDThe red dot looks intriguing. Not needing to cycle an action makes it easier.