I went to the pro shop with a little problem today,my 2315 xx78ss with 100 gr.muzzy 3 blades and 4"quik spins vanes werw shooting great out to 25yds anything further and the arrows would be about 3 inches left. He \said he'd fix me right up,he took out the lazer centershot and sure enough it was off!!by about and eighth of an inch!!So he got top dead center on the arrow, came home and my first group at 30 yds crushed 2 arrows, not robin hoods but damn close, so if your pro shop has one and u have similar problems, give it a shot worked for me!!! bow (mathews legacy 29" draw 27 1/2 inch arrows


w muzzy zero effect rest andimpact archery cosmic sight)
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Sounds liek I might have to give this a try.Especially on my boy's bow.He is having problem we have tried just about adjusting all but seems the further out we get the more it is off.Tried adjusting both rest then sights and nothing has worked.

Why would the centershot affect the broadheads? Scientific explanation?

I have one of those Eze-Center's and man let me tell you I love that thing... The nice thing is that not only does it set centershot, but you can also use it to check and see if your torquing the bow.I would suggest you still use the walkback method to get your precise centershot, because NO tool can account for the dynamic centershot.