ORIGINAL: Roskoe
Hey, Rob - I just got back from the range and did not notice any significant difference. Both limb bolts were maxed out before - and I had to loosen to bottom one about 1/3 of a turn to get to measurements equal. Did not change the point of impact of the bow, group size,nor did it affect the paper tune. I didn't have the broadhead target with me, but would suspect that they are still shooting the same spot as field points as well.
A 1/3 wont chamge much. Like the above poster you can use this method to help make holding the bow at full draw more comfortable. It's balancing the pull from each limb so that one isn't pulling the other. I think bows these days are less effected by these things because they are more consistant. Still worth fooling around with.