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. Of course, all were quieter, but with no accuracy they were no good for me. While I could certainly get subsonic velocities, non gave the accuracy of good old A1680. I too was looking for quieter subsonic suppressed loads. They fed when there were only 5-7 rounds in the magazine, but once loaded with 10 or more not very well at all. Whole Bunches wrote:I've tried Bullseye, WW231, Unique, and AA5 in my Remington 700 16' 300 BLK with 220gr SMK's. Click here to download Sierra Bullet’s 300 AAC Blackout Load Data for the 5th Edition Manual. Effective range for hunting is about 100-150 yards. There I sat 10 yards from 20+ pigs with a rifle that hung up round after round. It provides similar effectiveness to the 7.62×39 or the slightly more powerful 30-30 cartridges except works in the more up-to-date AR15 platform. 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. 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.
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