300BLK. I am happy w/ the way this project has turned out. The rifle shoots smooth and is very controlable. Due to an ammo shortage I was only able to put 100 rounds through it. I will say, even w/ limited time behind this rifle, its left a smile on my face. Im guessing it was the concussion from the PWSFSC30 that knocked my phone over. This range has a 4 sec b/w shot rule. [ame=http://www.youtube.com/watch?v=xnrYQpeqicU]YouTube - 0625110844.3g2‏[/ame] 9 1/2" target @ 25 yards DD. Im happier w/ this rifle each time I take it out. Found a cracked PMag. It had a half inch crack down the spine. [ame=http://www.youtube.com/watch?v=JC0MoUC5NMo]YouTube - 0625110904.3g2‏[/ame] [ame=http://www.youtube.com/watch?v=Bz_2kDI5CGk]YouTube - 0625110909.3g2‏[/ame] 9 1/2" target @ 25 yards Im no Travis but my spread is shrinking w/ each range trip. It was a great day, alone.