5.56 on Blacktail

[konradcountry]

Or a 6.5 Grendel, 350 Legend, 450 Bushmaster, 458 SOCOM …

Maybe one or each.

Any of the above are a much superior choice to the 300 Whisper.

Why do you keep calling it 300 Whisper? We are talking about 300 Blackout. They are close but not the same.

300 Blackout comes in both sub and super. You seem to think he is limited to subsonic bullets.

[j_h_nimrod]

I really like the 300 Blackout. One of the better cartridges on the AR-15 platform. I would not say any except the Grendel were superior for deer and it is all situational, regardless. The 350 Legend I think falls short though.

On an AR-10 I thought the 45 Raptor might be fun

[Goshawk]

Or a 6.5 Grendel, 350 Legend, 450 Bushmaster, 458 SOCOM …

Maybe one or each.

Any of the above are a much superior choice to the 300 Whisper.

Why do you keep calling it 300 Whisper? We are talking about 300 Blackout. They are close but not the same.

300 Blackout comes in both sub and super. You seem to think he is limited to subsonic bullets.

The loads on both are the same. The Whisper was first developed for subsonic and supersonic. The blackout has a longer chamber but the cases and load are identical.  The renaming of the Whisper or 308/221 to Blackout was marketing only; not performance.

[CastleRocker]

As far as 300 Whisper vs. 300 AAC Blackout being "not the same"...I used a Whisper shooting handgun silhouette matches a loonng time ago.  I have a Blackout upper now, and use my old Whisper dies to reload for it.  It's about the same amount of difference between the 556 and the the 223, or the .264 LBC vs. the 6.5 Grendel.  Yes they are "different", but only in SAAMI spec, and will shoot out of the same chamber.

Back to the subject...Kodiak Blacktails don't like the Mini 14, and neither do Caribou.  With a well placed shot, they will fall.  That being said, the only reason I used it was, that's what I had at the time.  If it was legal in this state, I wouldn't use it.

[Goshawk]

Oddly enough, the WDFW allows you to use the 223 for Cougar but not deer.

[Goshawk]

Here's the difference.  Regarding performance they are identical. Sort of like arguing over which is better, the 30/30 or the 30 Winchester Center Fire.  I use the name assigned by the guy who first commercialized the round, J.D. Jones.  The blackout is nothing more than the Whisper rebranded and standardized.  Yes, I own one. Yes I've used them on deer and coyotes. No, I've never been impressed with their performance compared to the 308, 270, or other accepted big game rounds. Pushing a .308 bullet a lot slower than what the 30/30 does just does not impress me. Are they fun? You bet! Do they have a place? Absolutely, with the same limitations as any lower power round in the deer woods has. 

[konradcountry]

No, I've never been impressed with their performance compared to the 308, 270, or other accepted big game rounds.

Well none of the AR15 rounds are going to compare to a 308 or 270. That's like saying that a 3030 doesn't compare to a 308. Well yea but they are still great for hunting within proper range.

I also don't see why you keep putting the 300 blackout down when you clearly aren't familiar with the ballistics.

You compared it to a 357 out of a carbine which is completely false. The energy of a hornady 110 has 1071 ft pounds of energy at 100 yards while a 357 in a carbine has around 715. That's like saying 357 and 44 are the same when it comes to energy. It just isn't true.

You then called the 350 legend superior when it is designed for straightwall states and falls from the sky at 200 yards.

All the AR hunting rounds have trade-offs. Blackout excels at value and in short barrels. There is no do-all AR round.

[Jonathan_S]

RE: "no do all AR-15" i can't figure why the 6x45 isn't more popular. It's about as close as it gets to all purpose for the -15

[Goshawk]

It's all about the marketing.

If it was standardized by an ammo company and renamed "SS6" for something elite sounding like Silent Sniper 6mm, it would be the round to have. 
Remington came out with a nothing less than Great AR15 round called the "30 Remington AR" that was smoking hot for an AR15 frame, then through the efforts of not releasing any brass or load data managed to kill off their own efforts.  Someone in Remington fell out of favor with the boss!

The full length necked up 223 to 6mm, 6.5mm, 25cal, 7mm, 30cal (my favorite) and finally the 32caliber all are capable rounds that do better on larger game than the .223.  The 223 or 5.56 was never intended or designed to be a big game round.

Back to your observation. The 223/6mm was very popular on the shooting benches at one time till the 6mm PPC showed up.  Olympic arms made a 6mm PPC  AR15 that never really took off since giving up magazine capacity almost never appeals to the SUW (sport utility weapon) crowd.

Either way, they are fun to play with!