The variation you're seeing in your bass is normal IMO. There will be some variation, particularly amongst different size classes of bass as they each feed on different food sources. It sounds like the pond is on the bass heavy size. If you are trying to grow trophy BG, you're well on your way there. If you want your bass larger, you need to start thinning them out IMO. Have you ever done a seine survey on this lake? It may be a valuable tool to truly understand where the fish population of the lake is. If you are interested I can explain how to do one...
