Every 9mm I reload I drop in this guage if it fits great if not then you just found a problem before it becomes s serious problem.I use these for all my pistol and rifle cartridges and the lyman gauges are cheaper than any other brand and work great.
Pros: If it fits in the guage it will fit in the gun.
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.