Thats a great breakdown of some really good multipurpose cartridges. All nice information, but in a nutshell, if you don't like 300 Blackout (Blk), don't use it. The thread is not about any of those cartridges, it is about the capabilities of the 300 Blk. Every caliber you listed requires special magazines, special bolt heads, special this that and the other. They are also not commonly available many places, with little selection where you can even find them. They are additionally much more expensive. Several take a larger framed rifle to even use them. The Blackout will do what it will do, and will do it out of an AR-15 or small framed bolt rifle. All with easily found components at a reasonable price. At 500 yards you can place a 110 grain bullet on a reasonably sized target (lets say 2 MOA) with relative ease out of these systems. If you don't like the limitations or abilities, its just not for you.
Most importantly to me, the 300 Blk will do any commonly known 30 caliber subsonic BETTER than the 308, something discovered clear back since the development of the 30 whisper. Hunting is not the only reason to use this caliber, nor what it was developed for. It will however do the job nicely withing its range limits for medium game. 200 yards on a deer, if it walks or hobbles very far away, you made a poor shot. Inside 150 yards with subs, the 205 SGK keeps 1000+ fps if started at 1050. The 190 sub-x is limited to 100 yards there. The damage will be greater than a broadhead arrow can do at 20 yards. Is an arrow insufficient to kill deer? Whatever medium you are shooting, plenty of photos of real game killed show sufficient expansion and damage for hunting.
No one I read is advocating long distance shots at game in this thread. Tactical uses could vary. To ignore the many, many, many verifiable kills of game inside the 200 yard parameter with the 300 blk is your prerogative, but why? The 22 short all but wiped out the whitetail deer herds of Mexico after Santa Anna banned all larger calibers. A 190 - 220 grain bullet moving faster won't do the trick on a deer? Just like ALL hunting, know your limits in marksmanship, your weapon/calibers limitation, and game anatomy. Every single "they walked away from a heart shot" story I've seen, the marksman misjudged their shot placement. I have misjudged a few shots on game in my life, but was taught at a young age the bullet does not lie. The angles were not what they seemed. Range was mis-estimated. You made a poor shot. All will happen if you shoot at enough deer. So many are so quick to blame the arrow.....
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