A few years ago I spent a ton of money on an LWRC gas piston PSD ("personal security detail") SBR in 5.56 caliber. I made the purchase after watching the Future Weapons episode on LWRCs gas piston SBRs. It was purely an impulse purchase (and a very expensive one at that) In retrospect the PSD was really designed for a 6.8SPC (and I later bought a 14.7 inch LWRC for that caliber as well) but at the time i mindlessly purchased a PSD in 5.56 caliber because it looked like the coolest thing since sliced bread, the dealer didnt have a 6.8 SPC PSD in stock and I wanted to get my hands on thta rifle at all cost. As the impulse wore off, and I had a moment to reflect -- I realized that an 8 inch barreled SBR in a 5.56 caliber may not be that great of a purchase. Like so many people, I collect for fun but I also try to buy weapons that can be used for defensive purposes if need be. According to LWRC's stats, the rifling on the 5.56 8 inch PSD is 1:7. What choice of ammo (if any) can make this weapon even remotely suitable as a defensive weapon up to 100 yard? up to 200 yards? and (if at all possible ) up to 300 yards?
