I am 6'5, so my hands are quite big. When I play RPB in any case, I can rally just fine, just when it comes to looping I feel like I am hitting it randomly. I thought that the grip might be the problem, but obviously it's probably practice.
I am a penholder who is trying to learn RPB, but learning RPB using Ma Lin's grip is really difficult so I switched to Wang Hao's Grip. Usually penholders have a 2-3 cm gap between the handle and the rubber so they have room for their index finger and thumb. Wang Hao's rubber is straight up...