Quote Originally Posted by balyon885 View Post
I use imr4227, and load around 16.5. I'm currently running a 16 inch barrel. I plan to build a pistol upper soon but with the same carbine gas set up it shouldn't be an issue. I haven't used a chrono yet, so not sure where I am sitting fps but haven't had any issues.
Thank you. I am still deciding on which free float tube to put on the 8.5" pistol upper I'm building. Pistol gas on mine but that load might just work. I will give it a try.