Well, after looking at the 300 BLK and this 350, I definitely went with the 350 Legend. Greg_R got me interested in them. Really excited about this AR-15 Upper. I need some thing better than a darned shot gun with slugs here in Iowa. Since this caliber IS IOWA DNR approved, no matter what has been on the Internet, I ordered one today. Will sight in basic with the 145gr ammo and then the 180gr I will use to hunt deer again. Tired of not being able to shoot a trophy buck at 150 to 250 yards with my shot guns. This 350 qualifies here as a straight wall cartridge. I have even an email now from DNR stating it is. Caught it on sale! https://www.bearcreekarsenal.com/bc...arbine-length-gas-system-1-16-twist-w-15-mlok Pretty good at only $249 plus shipping to the house. Got a nice deer gun in an AR-15 now!