Always re-sight your gun when you change ammo . Hopefully it will hit in the same place , but why take the chance . You don't want to find out with a miss on a hard -earned turkey ! Even if it is the same manufacturer , shot size/weight per pellet can make a difference in your pattern density . Therefore flight can be affected also . Throw some dollar bills downrange and just make sure . It will probably only take a couple shots to be sure .