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6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

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Unread 12-17-2009, 11:37 AM
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6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

In recent years, there has been a huge increase in the number of 6mm wildcats being shot out of AR-15ís. This movement was started and driven forward mainly by across-the-course high power shooters that have to compete at ranges out to 600 yards where wind drift can become a big problem. The existing commercially produced 6mm match bullet lineup has bullets that have a significantly higher ballistic coefficient (b.c.) than is typically available to those shooting with the .223 Rem. (or 5.56 NATO). For instance, the age old standard 600 yard loading for the .223 is the Sierra 80 gr. MatchKing bullet that has a b.c. of only .420, but the current 6mm Berger 108 gr. BT bullet has a b.c. of .546 and the 6mm Berger 105 gr. VLD bullet has a b.c. of .556. On a windy day at 600 yards the bigger 6mm bullets can be affected by the wind significantly less than the .223 Rem. counterparts. Read More...
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Unread 12-18-2009, 08:50 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

Nice article, that sure is an interesting cartridge and rifle. Sounds like they would be great for LRH coyotes and prairie dogs. Enjoyed reading.
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Unread 12-19-2009, 01:46 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

Can you tell us how this cartridge compares to the .243 WSSM?
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Unread 01-04-2010, 06:06 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

It don't compare with a 243WSSM. The WSSM is much faster and shoots heavier bullets flater. This is the dream cartridge that long range AR shooters have been waiting for.
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Unread 03-11-2010, 12:32 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

I have been researching wildcats for the AR-15 for upcoming AR benchrest class and "F" class style shooting for AR-15.

There are tons of cartridges out there for AR-15. It the article, Mr. Whitley discusses the dies, magazines, complete uppers and even complete rifles are ready. He also has load data for a variety of powders/bullet combinations.

The Turbo 40 looks great.

Major Competitors to Turbo 40 in long distance shooting in AR-15:
.223 - 80, 90gr bullets highly affected by wind.
6mm BR - available magazines.
6mm TCU, 6x45 - lack of velocity with longer bullets.
WSSM - lack of bench rest quality brass, but flatter trajectories.
Grendel - lack of velocity
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Unread 04-19-2010, 06:03 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

Interesting read. I just received a tricked out AR in 204 ruger I haven't had to the range yet, and I am interested in replacing a good shooting 788 / 243 with something like this to enhance my 2# triggered lower.

I believe the issue with 223 length bumped to 6mm or 7mm ala TCU is the ctg OAL and having to single load them, correct? I laid one of my 7TCU 100 gn hp ammo on a AR magazine and it looks like a no go, or is my memory incorrect?

On the WSSM isn't bolt thrust an issue with the added pressure it must produce, or am I wet there also?

Dissapointing to me is the 10x reloads with expensive brass, if used for dogs by the hundred shots a day, although I suspect in a 12 hour day, 720 minutes, that's a shot every 3 1/2 minutes, and you must cool the gun....so maybe 75 shots with this gun a day isn't unreasonable for dogs. Brass at $72 /100 vs $22 / 100 for 204 ruger, $40/100 for my 221 fb....

Still seems like a cool thing to get. Anyone have a used setup they want to pass on for further development by me...? LOL
I have a great 788 to toss in the mix toward getting a good shooting 6mm upper......

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Unread 04-29-2010, 04:09 PM
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Re: 6mm Turbo 40 Ackley AR-15 Review By Robert Whitley

Are AR-15 barrels available for this cartridge?
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