My 9mm carry ammo is 124 JHP; G. D. or HST.

My range/practice and match ammo is handload with 124 gr Zero JHP and VV n320.
The combo of n320 which burns clean, and the encapsulated bullet base/no exposed lead- of the JHP, keep the Red Dot screen substantially cleaner than other combos I’ve used.
When shooting a couple hundred rds. practice session or match, this has become a consideration.