It does depend on how your personal insulin sensitivity is but 300g of carbs is basically a full-on high carb diet if you ask me. My feeling is that to reduce carbs strategically one should consider the ketogenic path. There is an introductory phase of a few days which is challenging but once you are past that your body will be in ketosis and getting most of its energy from fat rather than carbs. Most people report a brighter an more agile mind (the brain responds well to ketone body energy) and a lot less hunger between meals. Most, though not all, also report a marked improvement in cholesterol and other blood lipid markers and there is some evidence that the near elimination of carbs can help with other common ailments related to tissue inflammatiohn. While many associate Ketogenic diets with the aim of weight loss you can also do a maintenance ketogenic diet. And of course it's great if you are trying to control your BG.