Well since i have SMLs using powders that FAR exceed BH209 in speed, pressure and temps, i think its safe to say sabot fouling is virtually nonexistent. Ive never seen any sabot fouling accumulate shooting loads well over 2600fps unless a sabot is blown.
Its pretty simple to see it. Poor boiling hot water down a bore. Run a patch....Sabot fouling will look like silly string snot on the patch. Solvents are almost worthless dissolving sabots. Bore creams/polishes work better. Brownwells shotgun wad solvent though gets very good reviews buts mostly just naptha (60-80%). Acetone has been suggested also but ive never tried it.
Tell you what...call both MMP and Harvester and ask them what will dissolve it.
