Ammunition & Reloading
I'm going to purchase one of Arsenal's SGL rifles (semi-auto 100 series AK variants), either the SGL21 (7.62x39mm) or SGL31 (5.45x39.5mm), and my only hang-up is on my lack of knowledge when it comes to the ballistics in between the two.
I'm kind of a .45 ACP guy, so if you asked me I'd say...