I would have to say that it has more to do with quality of lens then power. I can see better when my Sequoia at 15x compared to 45x at long distance. It’s allot clearer. I did a test with my spotting scope and can’t really remember the results but 300 yards is a good distance. I’d have to check it again to see what a 30 caliber would look like at 300 yards. Hopefully some one can give you an answer, if not I can check it again...