440 Overheating 230 degrees

new radiator is in, went with a Derale 16” flex fan since that’s all that I have room for. Car was right at 197 going 60mph, then about 205 at 40 mph. Then got back onto the highway doing 60 and temp kept climbing. Gauge was maxing out at 260. Second I pulled in the garage I put the temp gun on random parts of the radiator, near gauge sensor, metal near inlet and outlet of rad, nothing read above 200. So may be a gauge issue. Probably going to take it to a shop because I’m really sick and tired of dealing with this car at this point.