Well, the last weapon I used was the .50 BMG anti-material rifle in New Vegas. So on the plus side I've got a few hundred rounds of ammunition between the standard .50, AP, and match loads that in real life could take out targets 2500 meters away. On the downside once I fire everyone within a 3 mile radius knows exactly where I am. I'm still comfortable with piercing an alien's defensive armor with a half inch round traveling at 3,000 feet per second that can go through a half inch of solid steel like a hot knife through butter.