I guess one question I have for the OP is why you felt the need to get another mpc in the first place? What are you hoping to get with this new mpc that you aren't getting on your Hite? It's likely a much more closed tip than your Hite, and I think your low register struggles might be due to this sudden change. That's not to say that this mpc isn't capable of a great low register, but the difference to you may feel drastic. Does it feel like you can't get as much air into the horn as you'd like? .077 is very small for a tenor opening.
Make sure to stay really relaxed and "release the reed" so it can vibrate at its maximum. All else being equal, a smaller tip generally wants harder reeds. I personally would use about a #4 on something like that, but in the end you'll have to experiment for yourself. It may simply be that the mpc isn't for you, but I always recommend lots of experimentation with reeds before coming to a conclusion about a mpc. Good luck
Make sure to stay really relaxed and "release the reed" so it can vibrate at its maximum. All else being equal, a smaller tip generally wants harder reeds. I personally would use about a #4 on something like that, but in the end you'll have to experiment for yourself. It may simply be that the mpc isn't for you, but I always recommend lots of experimentation with reeds before coming to a conclusion about a mpc. Good luck