1 hour post-prandials for the most part don’t matter - which is to say, you should NOT correct at 1 hour post prandial because the majority of your insulin won’t finish work until 2-3 hours… take a reading at 1 hour, 2 hour and 3 hour and you’ll see how you naturally come down. Your question about what’s a “normal” rise however is perfectly normal, and I’ve heard a variety of answers. If you start at 120 and you go up 60 points to 180 and are down to within 30 points by hour 3 (so 150) then your ratio is more or less correct. Even hour 2 is cutting it close, though it should be lower than hour 1. If you went up again, then that’s bad. If you are jumping to 250 or 300 at 1 hour, then you probably just didn’t take enough insulin. But you should not expect to be exactly the same at 1 hour post-prandial as you were pre-meal because your insulin doesn’t work as fast as food. That’s why they tell you to take insulin early. If you are having huge spikes most meal despite taking insulin early or eating low-glycemic foods, you might want to investigate symlin. Symlin is a naturally-occuring hormone in non-diabetics that is associated with the release of insulin. Symlin helps slow down the emtying of the intestines, so that your blood sugar does not spike as quickly. It’s more inline with how quickly the insulin works so things stay more steady.