The dealer just installed them and I haven't even checked the PSI but I imagine it's what is stated on the tire. The first time out there was definitely some break-in feeling needed, as the second time out felt much better. They do feel slightly over-inflated so you are liking 18 psi? I will try that this weekend. Thanks for the advice.
Where I hunt (buggy is primarily a farm and hunting vehicle), in South Texas, we have a lot of thorny brush and mesquite trees, cactus, as well as lots of rock, mostly loose rocks as opposed to large boulders/mountain like solid rock... I have the BFG tires on my ranch truck (Chebby Z71-Offroad), and they have performed well there... With 18 psi, the tires stand up straight with little to no sidewall bulge. Most of our flats/punctures come from brush through the sidewall if it is soft/bulging... You might be OK with 12-15 psi if you're wanting a soft ride and don't have to contend with sidewall punctures... If your dealer pumped up to their recommendation, you've probably got 30 or more psi in them... Mine rode like a tank like that!! I put it on jack stands yesterday and let the air out and pumped in 1/2 gallon of Multi-Seal HD2500 tire protectant in each one, then pumped back up to the 18 psi... Will see how that works out... The multi-seal virtually eliminates puncture flats, even by hole punctures...