String slap question

[Cryogenic]

I am having a problem with string slap, but the odd thing is that it's only on one of my bows.  I have a Sky Archery heavily reflexed flatbow, a HH Big 5, and a Pronghorn 3pc.  It's the 3pc that slaps me. My form is the same with all 3 bows.  In order to avoid a significant string slap with the Pronghorn, I have to grip the bow rather tightly.

My first thought was brace height.  The brace height on the HH Big 5 is 6.5.  I don't remember what the other 2 are, but they are normal and within manufacturer spec.

Any thoughts as to what's going on?

[LittleBen]

May relate to the wrist of the grip. if you're using a high wrist grip on the 3 piece only you may be in a slightly different shooting position. I find the more the bow arm is extended towards your backside and the more it's outstretched the more likely to get string slap ...

[Bjorn]

My first reaction is you should not feel a need to grip any bow tightly. I would look at your elbow position-have it rotated down and out. Also check your foot position-back foot may be too close, should be shoulder width apart and back.

[Cryogenic]

I am certainly using a low grip.

To be honest, it is likely my elbow.  I have no idea why I shoot this bow differently from others, but when I concentrate on my elbow position--no string slap!

I suppose that should have been obvious to me.

Thanks all for the help!!

[Arkansas Osage]

This should be in the shooters form forum, but I would agree with bjorn. Glad you got it figured out.