You are correct in assuming I am fairly young at 28. I handload, so I have that going for me although I'm fairly new to that part of the hobby. I take it that the .300 magnums loaded with 200-220 grain do not equal the on game performance of the various medium bores from the responses here. I suppose a big bore lever could be worth considering as well, there probably aren't many scenarios between 200 and my personal limit of 500 that a 160-175 grain partition from a 7mm rem mag isn't suitable for.
