I heard a few years back, I think it was in a golf digest article about how to hit it 300 yards. The guy started with a swing speed of 100mph and someone told him "You probably max out at around 260". I think for that guy at that time, that was about right. There seems to be some common wisdom about needing a 120mph swing speed to hit it 300 yards. Maybe they are referencing carry there, not sure what the disconnect is... I've seen numbers on several launch monitors that were really good with a swing speed that would be considered low. e.g. 104mph, 288 carry, 306 total. At first I thought it was just a crappy launch monitor, but some really good monitors out there seem to all concur that you can hit it over 300 with a swing speed in the 102-104 range. Who's right? The launch monitors or random golf mavens?
Post some data if you have some or just give honest anecdotal evidence that you can hit it over 300 without swinging 110+