I am another that would get rid of a gun before going to checks.
I ran the Lee 200 with ASBB HF red coating and no checks through my 357AR, and all of my 357 Maximum guns. They shot good in the maximums and shot OK in the AR with manual single feeding. Alloy was range lead water dropped to around 10 bhn.
The Lee 200s did not feed in the AR from the mag worth a darn. The edge of the Meplat was typically catching pretty bad.
The bad feeding was what pushed me into making my own mold. When I first started with my plain base 180 and 200 NLGs, I felt that the customs shot just a little better than the Lee (but they fed a whole lot better). Eventually I worked up a just over 2000 fps load with the custom 200 that is pretty reliable at 2 MOA.
Attachment 263683
Attachment 263680
The 180 / 200 loaner mold is back home gathering dust and is available.