.223 Ackley and 75 gr A max

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flyinlead

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Anybody have experience with this combo? I have been daydreaming a lot about a new custom 1/8 barrel in this calibre.
Is 3100 fps a reasonable expectation in a 24" tube? Are there any powders that will do this and are also reasonably temp stable?

Is it more economical to convert my stagger feed stevens 200 to DBM with aftermarket parts, or just buy a new 11fcns with dbm and sell my stevens?
 
Um, the cartridge is fine, but what is the fixation witht he 75 Amax? It has a mediocre ballistic coefficent; the 80 is better and Bergers are even better still.

75 doing 3100, nope. Not even close. FYI, there is a good collection of data on the 6mmBR.com website regarding the 223 AI
 
I got 3050 with TAC in a 22", 8 twist 3-groove PacNor. TAC apparently IS very temp stable, can't say I've chronographed it at 30 below.

With a 24" and perhaps moly you might hit 3100 but I wouldn't sweat it.
 
I wanted one to carry on my Skidoo, and not worry about beating it up, so bought a Stevens 200 with factory 22 inch, 1:9 twist. Bill Leeper set the barrel back and rechambered it with his usual outstanding workmanship. Everything else is factory stock.

It gets the 75gr A-Max past 3000 fps with ease, and puts a magazine full (4) into an inch or less all day long every day, and the brass just lasts and lasts.

Believe me when I tell you it shoots plenty flat to 300 meters, and is still close to a minute of angle out to 600 yd, the longest distance on our range. Absolutely devastating on our biggest coyotes. Haven't tried that bullet on wolves.....yet. :)

Ted

PS: Nosler 40 gr Ballistic Tips get over 3900 fps........ have gone to 4000 fps, however that is leaning on the brass pretty hard.
 
Buy the factory savage with the det mag you want. Parts are a royal pain to get and pricey.

If you are interested in selling your 223 Stevens, let me know as I am looking for another donor. Prefer the new gen 4.40" bolt spacing but will look at the last gen action too.

If you are reworking a factory savage 9 twist barrel, the 75gr Amax is a hoot and can shoot very well ( have some take off barrels to sell if you want a spare).

We were out this morning plinking to 1200yds and my shooting buddy uses a Savage factory rig. Sure was fun smacking smallish sized rocks at those distances.

If you are going with a 8 twist barrel, then I would suggest you consider the 80gr Amax and Bergers. I use these in my Shilen and man do they fly nice. The wind drift is noticeably better too - not huge but noticeable.

3000+fps would be about the speed I would expect from a 223AI in a standard length barrel. 3100fps might be possible if you throat long and get lucky with a powder combo but I wouldn't worry about it.

we weren't shooting beyond SAAMI specs and it did just fine.

Jerry
 
Thanks for the info guys, this is some good food for thought. I will pick up a can of TAC.

Its pretty cool that even the savage factory guns can shoot so well. Gotta try the 75 gr in my .223 non-ackley soon.

If I get a 1/8 I will definately try those 80 grainers.

Mystic, I will PM you about my stevens.
 
if you dont get a 1in8 you will regret it. forget the 1in9 becuase it cant handle the 80s. in the ai config you may even take a hard look at a 1in7 for the 90 grainers, but thats really for hard core competition. Mostly you will find the 80 grain bergers and SMKs are the way to go.
 
I like the 75 amax because it shoots like a target bullet, but hits like a varmint bullet. H335 will gets me 3100 out of a 22" 1-8" rock barrel w/ mollied bullets. I can't say the 75is any better than the 80-I just havn't worked through my stock of 75's, so the 80's are still on the shelf. Ballisticly, the 75 and 80 berger stomp the amax, but my .223 AI is was built to kill stuff, so ballistics w/o terminal performance are moot. It shoots its fair share of 62 TSX too...
 
mpwolf said:
I like the 75 amax because it shoots like a target bullet, but hits like a varmint bullet. H335 will gets me 3100 out of a 22" 1-8" rock barrel w/ mollied bullets. I can't say the 75is any better than the 80-I just havn't worked through my stock of 75's, so the 80's are still on the shelf. Ballisticly, the 75 and 80 berger stomp the amax, but my .223 AI is was built to kill stuff, so ballistics w/o terminal performance are moot. It shoots its fair share of 62 TSX too...
Click to expand...

Buddy, don’t underestimate the heavy SMKs for killin.
I have shot many grondhogs with a 223 with 80 grainers out of an 8 inch twist and they were totally friggen smoked. It's a mystery to me that makers of these bullets dont promote them for hunting.

Think of it this way...

In long range competition, one of the greatest frustrations for the shooter is having his bullet blow up on its way to the target. Unfortunately this happens quite a bit. Now the reason it happens is that long range guys like heavy bullets because they tend to deflect less in the wind, but to get heavy bullets to fly straight you gotta spin em quick. Its that rotational force that makes the bullets fly apart because they can’t always withstand the rotation (centrifugal) force.

If you think about that from a terminal performance perspective, it means these bullets are flying just under the ragged edge of self destruction. What do you suppose is going to happen to the bullet under these conditions when it hits something?

It's interesting how this subject is never raised on ammunition literature, but barrel twist rate has alot to do with how a bullet will perform when it hits.
 
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