Hola from the south Amigo,
You will still be able to load a bore sized and even a larger than bore sized ball with a patch without the teflon coating. However the patch material will have to be the type that will withstand the preasure and heat which usually is some sort of sail cloth material, canvas etc. The teflon will only allow you to load the larger balls easier but the material will all be intact no matter the lube used. The ball on the other hand, being near pure lead, will readilly conform to the dimentions of the bore, its grooves and the patching once it is seated and this usually ends up distorting the ball a bit.
rabbit03