I think by the very nature of cartridges over .35 caliber in North America makes them somewhat off the beaten path. For all the gun cranks like us, there's a ton of guys who just buy a box of '06, .308, .270, .30-30, or .35 Remington ammo every three to five years. The .375 Ruger has become pretty popular lately... for a Big Bore. I bet if I asked my hunting buddies if they have ever heard of it, I bet half would give me a blank stare, and the other half had heard or read something about it but knew very little.