Birthing problems II

[pug]

Its a place to start but keep in mind that bullet weights that light in subsonic can be difficult to get to cycle your action properly. You may want to start with at least 220gr and then go lighter in steps. With a standard port in the pistol position 150s will not cycle for me and I have to open the port up a bit to get them to work. Then you need adjustable gas in order to shoot supersonics so there is a trade off. Or you can cut the gas off and not worry about cycling.