What kind of breaker
I haven't had any issues with the 'knock-off' types that HD sells, but I know what you mean Muck. I separated a circuit and added another to a panel recently that kept tripping the breaker. It was an original 20A breaker, at least it looked so. Funny thing was it wouldn't trip until it reached 29 amps. I watched my amp meter sit at 27A for over a minute, had the HO turn on a few more lights, then it went to 29 and finally tripped.
Trust me, I'm no real fan of Pushomatics, but if that's whats there to work with....well....
Just because you can, doesn't always mean you should