I shoot a lot of Teflon, started about 30 years ago. I have shot Texas, Minuteman, and Arrowood. Like any other patching depends on the gun. One rifle has an Orion 50 cal barrel .495 Hornaday ball, .015 Minuteman,
I have two rifles with Green Mountain barrels, 50 cal, .495 both Hornaday and cast I can use either one with .020 Texas or .019 Minuteman.
I have Douglas 45 that shoots Arrowood .021, .445 Hornaday. These are all target rifle. I do not use Teflon in my off hand rifles.
Michael