Cleanest 223 Powder?

I, too, alway thought that ball powder was dirtier than others. But from the tests I've done with my 223, the dirtier I've found was Benchmark (extruded) and the cleanest was WC735 (ball).
If you want ball powder and clean, try WC735
 
I think ball powders in general are a bit cleaner if you wind them up to the top end of the load data. They are definitely filthy if loaded on the low end. I am down to pretty much only using WC735 anymore.
 
I think ball powders in general are a bit cleaner if you wind them up to the top end of the load data. They are definitely filthy if loaded on the low end.

This is a general rule of thumb with all spherical powders.
Load them up - no issues.
At lower pressures, sooty, dirty, and unburned powder evident.
I burned quite a few pounds of old H870, and it was good with full power loads, but filthy if the pressures were down.
Eagleye.
 
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