I'm not sure what the 8" barrel gets you in terms of any advantage. With numbers that low, I'd sort pretend I was bowhunting, and wait for the double lung broad side. At 100 yards you'll still have about 1750 fps and 750 ft/lbs. 8" barrels likely will loose what, maybe 200-250 fps? I've seen some info indicating the AAC 110 barnes load will do about 2000 out of an 8" barrel. The Barnes factory laid supposedly does a bit over 2300 with a 16'. Supposedly the Barnes TTSX opens up at speeds above 1400 fps. I wouldn't be real excited about this, with only one exception: Maybe something like the Barnes 110 TTSX has a larger velocity window. I'm thinking the 8" barrel won't provide the speed needed to open up the bullet well. I'd be really worried about the velocity loss. I dropped her, but the damage wasn't what you'd expect out of 225 grains of. I witnessed this on the cow moose I shot at 292 yards. I might be able to hit stuff farther, but the bullet won't open well. Well, those big bullets slow down in a hurry, and at 300 yards I'm down to 2076 fps. The 225 grain Partitions really needed a decent 1900 FPS to open well. If you start using factory ammo with really really short barrels, you may well find that impact speeds have dropped far enough that the bullet no longer opens and expands reliably. Its not anything like the 2900, 3000, 3100+ many other cartridges get. The AAC doesn't have a whole lot of speed to begin with. My concern with the shorty barrel and the AAC is velocity loss. Bullet performance also matters, probably more than just energy. 30 Carbine in the supersonic load.Įnergy is only part of the equation. The AAC either offers HALF the Carbine performance in a Subsonic, or it offers about 40% MORE performance than the US. 30 Cal Carbine analogy earlier, but I think it makes sense. Step the AAC up to a 125 at 2200, 2300 and you've now got three things:ġ) An expanding bullet that provides some internal damage to help insure clean killing on deerģ) a virtual ballistic twin of the 7.62x39 Improvement aside, the subsonic doesn't compare, even remotely, to any real supersonic rifle cartridge. That is a huge improvement within the limits of the suppressed world. Move to the subsonic AAC, and now its a streamlined 220 or 240, at the same speed, and it retains its speed. A 115 or 124 grainer, with a upper velocity limit of about 1010-1020, isn't a great performer. If you want a quiet weapon, that historically was a suppressed 9mm. Instead compare it to subsonic suppressed 9mm or even 45. To my mind, the proper comparison for the Whisper or Blackout isn't comparing it to other rifle cartridges. 30 cal Carbine load, again with a non expanding bullet. In other words, HALF the so called power of the. The Subsonic blackout varies some, but a 220 at 1010 fps for 498 ft/lbs is representative. And it gathered a fair bit of a reputation as a poor stopper. The old M1 Carbine pushed a 110 grain FMJ at 1990fps for about 970 or so Ft/Lbs. And it struck me as a comparison for the Blackout. Beyond that you might hit the target, but reduced impact speeds begin to make expansion iffy. I would feel comfortable with a 125 Nosler Ballistic Tip or equivalent light weight Hornady SST. The best available bullet is likely the 110 grn Barnes TTSX, which is designed specifically for the AAC. 45 ACP with 230 grain ball ammo, at 100 yards. In other words, you are hunting with a non-exanding, 220-240 grain bullet at muzzle velocities of roughly 1000 fps. Even if you could find a 220-240 soft point, impact speeds in the subsonic range mean virtually NO expansion. These are often BTHP or FMJ type bullets. The subsonics usually use a heavy for caliber bullet, along the lines of a 220-240. The 300 whisper (forerunner of the AAC) has been used by the Contender hunting crowd for a long time, and the Nolser 125 has a reputation of working well at modest speeds. It will work fine, provided you use a good expanding soft point (Nolser 125 BT works good) and ranges are modest. Supersonic is roughly equivalent to a 7.62x39 Soviet.
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