I'm new to the gun world and when I see different guns I wonder about what caliber says or does it really matter? Why would someone want a .22 over a .38 ? I understand the philosophy bigger is better and bigger could tear something up or take down a deer, but what about Accuracy? Does bigger take away from that when it comes to smaller guns? I don't think it does but I'm just asking. I plan to purchase a couple so I'm doing a little research. The berettas police force use look attractive.