First question:
do you have to lube the bore before shooting on every shot?
For patched round ball the lube is in on the patch.
For conicals the lube is put on the bullet.
For sabot lube is not use except after you clean the gun the oil is used to prevent rust as most powders are corrosive.
Second question:
how often do you clean is it between shots?
This depends on the powder and sometimes the gun itself.
The norm for me is to clean every shot [a necessity if you use 777] with 777 between the accuracy loss and crudring most have very little choice.
Black powder and Pyrodex I clean every third shot.
Blackhorn 209 I never clean until I am done shooting, it is the easy to use and for me by far the most accurate and it is also the most expensive.
There are several others made from an ascorbic acid base [sugar]
they are relatively clean should be able to get around 8 or 10 shots before starting to affect accuracy. They have 2 problems they are noticeably weaker than the other subs and good black powder and they readily absorb moisture, and become erratic.
YOU WILL ALSO FIND THE TYPE OF GUN YOU HAVE OR BUY WILL AFFECT WHAT WILL SHOOT GOOD.
If you chose a Hawken or Traditional rifle the most likely choice is PRB [patch round ball] the other choices depend on the twist of the rifling.
If you chose a modern inline such as a Omega, Triumph or Knight
then you have conicals available that will shoot very good if you need to use them because of your state laws, most of use can and do use sabot-ed bullets.
First thing is check the laws of the state you will be hunting in. then come back here and tell us what you have and what you need to shoot and we will help you. Lee