i usually start shooting again around the end of july, or early august. i always shoot field points probably up until aboutmid september so i don't destroy my target, then i'll switch to the muzzy practice blades, but they tear up the target a lot too. i usually only shoot my actual broadheads a few times just to be sure it's on with them, but i'll give muzzy a lot of credit, the practice blades and broadheads shoot very very close. for that matter, i've rarely had to adjust at all from field tips, to practice blades, to broadheads.

and i do try to line up the practice heads and broadheads with the vanes. haven't noticed any big difference, but i don't think it would hurt anything.