
With that being said they were pretty effective on the pigs that I did hit when it fired, but not much use being effective when they do not feed reliably. I tried filing the sharp edges of the feed ramps and while it did help some they would still miss feed every 5 rounds or so. It is also a very powerful round, making it perfect for taking down large game. It is extremely accurate and has a very flat trajectory, making it perfect for long range shots. They fed when there were only 5-7 rounds in the magazine, but once loaded with 10 or more not very well at all. Typically, subsonic loads feature heavy bullets-200 grains and heavier-loaded to velocities below 1,080 fps. The 300 blackout is a great subsonic round that is perfect for deer hunting. There I sat 10 yards from 20+ pigs with a rifle that hung up round after round. The Discreet Ballistics 300 Blackout 190gr Subsonic Target Load is intended for use in semi-automatic and bolt action firearms chambered in 300 AAC Blackout. This happened several times including once when I had a huge sounder cornered in a field surrounded by pig fence after they found an opening and could not find their way out.

My issue was the copper part of the bullet just past the flex tip insert would get caught on the feed ramps and would not chamber.
BEST SUBSONIC BULLET FOR 300 BLACKOUT SERIES
My Aero M4E1 upper/lower with a Ballistic Advantage 10.3" Performance Series barrel did not like to feed it very well, and I tried three different types of magazine including the P-Mag 300BO mags. I did not have very good luck with the Hornady 190gr Sub-X like ARx3 did.
