As a couple of the people here would be likely to tell you, I believe in getting all the accuracy available out of a muzzle loader even when it goes beyond whats useful in hunting.
It is my experience that with the Omega it is beneficial to accuracy to clean the breach plug every two groups, since I shoot a lot and this could turn out to be a chore I will tell you how I do it.
At Walmart they sell a flash light powered little screw driver it comes with a screw driver head and a 1/8 inch twist wood drill it will clean the area between the209 and the flash hole in a couple of seconds, be careful if you chose to use a metal drill as you might cut metal off the breach plug. The material in a TC breach plug is harder than the wood drill. Lee