GM .62 Drop-Ins

[nkbj]

Anyone here shoot a Renegade or TC Hawken with one of the 32" long Green Mountain .62 smooth bore drop-in barrels?
What loads have worked well for you?

Got one of the drop-ins that's been sitting almost twenty years and I don't think it's ever had a spark through the flash hole. So any way, what works for you?

 

[nkbj]

Nobody tried the GM smoothies? They're really right around .61 caliber.
Got .595 balls that I use in the rifled barrel.
There's a .600 diameter mold around here somewhere.
Thinking on trying .575 balls (with some junky zinc and copper contaminated hard alloy that is difficult to cast good bullets with) and use them for easy thick wet patch loading. This might be a fine application for a can of Jack's Battle.