You bought a used bow the draw length is 30 but you are a 27 can the bow be adjusted for 27?

If it is a compound bow, the type of bow with the pulleys or "wheels" at the ends of the bowlimbs, there should be some way to adjust the draw-length of the bow itself; it may be best to consult someone at an Archery shop for the best way to make such an adjustment. When using a Traditional bow -- a recurve or longbow, or other non-compound type -- the only "adjustment" is to simply pull the string back (in this case) to 27 inches; reducing the draw-length in this way also reduces the effective draw-weight of the bow.

Also, when using a Traditional bow, and the archer has a longer draw-length than the bow is rated for (i.e., the archer's draw-length is 30 inches, but the bow is rated at 27 inches), it is always advisable to make sure the bow is designed to withstand the longer draw-length. Failure to do so can result in the catastrophic failure of the bow, and possibly serious injury to the archer. Increasing the draw-length of a traditional bow will also increase the effective draw-weight of the bow.