I'm in the Army and currently deployed to SW Asia, and a while back my driver asked me if I'd ever consider going hunting with him when we get back. I don't know much about rifles so I'm looking for a little advice. What is a good all around caliber? 7mm, .308, 30-06? What manufacturers make quality entry level rifles/ scopes? With all the aftermarket parts would it be better to get a custom rifle made or buy a factory built model and trick it? Thanks in advance.