The controllers at Hartford were a bit confused at our flight plan, which called for us to climb to FL 450 through RVSM — we were fully compliant but not yet authorized — up to a VOR and loiter there for a while before heading back to Bradley. Our initial clearance to 23,000 feet went as planned, but the OK to go to 450 took a while. Once cleared, Goggins advised me to set the indicated airspeed climb to 300 knots, which allowed us to climb smartly directly from 230 to 450. The ceiling of the airplane is 51,000 feet, one of the few civilian airplanes with such a ceiling. Much of the cruising, Goggins told me, is done at 45,000 feet and at Mach .85, settings that, with four crew and eight passengers (along with other factors, of course), give that magical 6,000 nm range. The numbers we were seeing — Mach .85 and just over 3,000 pounds per hour total — supported that.