garyt1957
I've had the GBB 525 (4 of them), nephew had the DyTi6c 600cc, I hit the 650 SoooLong, and have a 750 SoooLong just for shits and giggles. Use to have a Golfsmith 1K (1000cc, 310 gram head, on a 39" hybrid shaft). I've heard of a Vulcan Golf training head that was 1500cc - I'd imagine there was some serious wind resistance with that thing.