Five lbs is good, and ten might be okay, it depends on your conditioning. If you read thru the threads on POW WOW, you will see post about shoulder problems, sore elbows etc. Try the following before jumping up in weight. You'll know afterwards.
Pull your bow back to full draw, but stop at 12",(2 sec.) then 18" (2 sec.)before coming to full draw (2 sec). When letting down stop in the reverse order pausing the same. Then repeat 3 - 6 times without resting. Then do the same from the opposite side (RH switch to LH). If you can do it comfortably, your ready to step up. If it is a struggle after the second rep then work on these exercises a couple weeks and you will be in better condition to move up.
Remember, shooting every day is generally not benefical to conditioning or form, and can be harmful, because the body needs a day rest. People are told do not exercise the same body parts, two days in a row. The muscles recover faster and gain strength by resting, at least everyother day.
There are a few sports, that involve the use of the arms, shoulders etc. When did you hear of a baseball pitcher throwing everyday?