I'm shooting a KAP Prostyle riser with Samick Polaris 23# limbs. I have a 28" draw length. I'm comparing Carbon Impact Super Club 15/25 and 20/30, both cut to 28" shaft only length. I'm only using a Hoyt Super Rest and no plunger for now. It is obvious from the smearing of the logo on the one vane and the curling of that vane that the vanes are hitting the rest pretty hard. It is worse on the 20/30 arrows, so I would assume that the 15/25 is tuned better. However, I shoot somewhat better groups with the 20/30 arrows and those are the ones that Carbon Impact recommends for my actual 23.4# draw weight with a 28" arrow. I have measured the spine of the arrows as .970 for the 15/25 and .850 for the 20/30.
What are the experts thoughts on this? Do I need to get a plunger?