hey guys,
i am going to start the lengthy process of building a SBR 9mm AR-15 and had a question about subsonic ammo.....
im seeing mixed reviews on what stays subsonic and what doesnt....some places say most 147gr loads stay subsonic regardless of barrel length
others are saying 147gr loads in only a 5" barrel stay subsonic
based on your experiences....which is true??
id rather not drop money on a can and have that annoying CRACK....
i am going to start the lengthy process of building a SBR 9mm AR-15 and had a question about subsonic ammo.....
im seeing mixed reviews on what stays subsonic and what doesnt....some places say most 147gr loads stay subsonic regardless of barrel length
others are saying 147gr loads in only a 5" barrel stay subsonic
based on your experiences....which is true??
id rather not drop money on a can and have that annoying CRACK....