SuperKirby
I am one of the forunate ones tht T7 really does work for and I really do not have a problem with 'crud ring'. I do not mind running a patch at the range and I can normally shoot 3 to 5 shots in the field with out patching if necessary.
BH is a very good powder and fact it is an excellent powder, but because of the amount of powder I go through in a year I just can not afford to shoot it. If money were not an issue I might make the switch myself, but even then I am not sure.
Just a thought in passing if you have been shooting Pyro all this time you might really like T7. Much cleaner powder, not nearly as corrosive and really easy clean up with just plain Windex patches for a quick cleanup.
Are not choices fun???!!!