#300 blackout subsonic load data 208 how to#

#300 blackout subsonic load data 208 how to#

If you can figure out how to make quiet subsonic 180 grain or under ammo you will become famous because not many people have figured out how to do that (and it's not from a lack of trying).īasically put the idea of running the same bullet in each rifle to bed. Pretty much unless you are shooting a bolt action rifle your bullets all need to be 190 grains or more to get reliable subsonic ammo. I've tried several slow powders and it had the same result every time. It won't be hearing safe at the ear at all. Basically that powder and how it creates pressure is relatively slow, and with almost any slow powder, the bolt will open while everything is still under pressure and the port pop will be LOUD. You CAN use a powder like Reloader 7 to get subsonic loads for all types of light bullets but the characteristics of the powder make it really loud. Since you said you are kind of a newer reloader let me know if you understand what powder shift is. You will basically cut back to the point that you get powder shift problems or cycling issues. Even then 190's are harder to develop a load for because they are a bit more picky when it comes to using the right powder. There are a whole host of issues when you try to go lighter than 190. Given we are talking about jacketed bullets here. In an AR it's a lot more complicated to try and get subsonic performance out of anything under 190 grains.