Well I finally shed some light on this for anyone interested. I didn't have a 38/357 and my brother in law hasn't been able to go shooting with me in a while so I still haven't shot the test rounds I loaded. I did however pick up a S&W 686-4 so naturally I needed to start loading some .357 rounds.
This time I went for a set of RCBS carbide dies. What a difference! The bullets aren't falling in the cases anymore! I'm now getting about .006" neck tension versus the .002" I was getting before. I'm also seating the bullet a bit lower as was advised previously in the thread. I contacted Hornady and need to setup to send the sizing die in. Hopefully they can replace the insert or die so I won't have to buy another die set.
This time I went for a set of RCBS carbide dies. What a difference! The bullets aren't falling in the cases anymore! I'm now getting about .006" neck tension versus the .002" I was getting before. I'm also seating the bullet a bit lower as was advised previously in the thread. I contacted Hornady and need to setup to send the sizing die in. Hopefully they can replace the insert or die so I won't have to buy another die set.

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