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308 A.I. at almost 2 miles?

 
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  #1  
Old 01-02-2005, 10:30 PM
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308 A.I. at almost 2 miles?

Would it be possible to hit a target with a 308 improved at 3000 yards shooting a 220 grain MK bullet? Just curious if anyone thinks it is feasible. I'm not trying it or anything.
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Old 01-02-2005, 10:48 PM
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Re: 308 A.I. at almost 2 miles?

I am assuming you have seen the articles page at: http://slrharbor.com/
These articles have got me to thinking about a few things, the biggest being what types of bullets, or rather, what makes a type of bullet pass through the transonic zone into subsonic without loosing stability. Im sure the answer is somewhere in Robert McCoys work, but I think reading through it might give me a brain hemorrhage!
Ive been toying with the idea of working up some reduced loads with the heavy SMKs that would go subsonic at 200-300 yds so I can do some testing for accuracy through the sonic boundary at 400yds. Not trying to hijack the thread or anything, but I think this would be the biggest barrier (pun intended). How about it guys any thoughts?
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Old 01-03-2005, 05:53 AM
 
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Re: 308 A.I. at almost 2 miles?

I don't think that you could push a 220gr MK out of a 308 (Improved or not at any barrel length) fast enough to keep it from destabilizing to the point of zero accuracy at 3000yds. I'd have to see it to believe it , hell 3000yds is a big step for a 50BMG let alone any 30cal.
Unless your shooting at aircraft carriers with it I woulden't see much point in even trying it. With a 50 sure a big 33 wildcat maybe but a 30 I seriously doubt it.
I've seen guys that regulary shoot at praire dogs at 1k with a 300Ackley and 210gr BergerVLD's launched at 3200fps try to hit 55gal drums at 2000yds and maybe hit it one out of fifteen shots , and thats a bullet with as high if not higher BC than the MatchKing going a hell of alot faster than a 308 could push it.
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Old 01-03-2005, 08:31 AM
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Re: 308 A.I. at almost 2 miles?

Precision Shooting ran an article that was reprinted in the book "Precision Shooting At 1000 Yards", authored by Steve Hugle. In that article they shot a 16" gong and a prarie dog at 3120 yards with a 308 AI and 220 gr SMK's. It is interesting reading.
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Old 01-03-2005, 10:33 AM
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Re: 308 A.I. at almost 2 miles?

If I'm not mistaken, the shots like at Adobe Walls, were way subsonic. And if I understand it correctly, the problem lies where the bullet is between super and sub sonic. After its subsonic its stable again mostly till it falls.

I recall that LR article in PS. Seems like they had stupidly silly looking tapered scope mounts. But it was required for the distance they were plinking at.

I don't think that 308 AI or even Win is the ideal cartridge to attempt a super long shot. But that doesn't mean its not feasible.

Last input is that in smallbore shooting there is a large difference in matches at 50 yards and at 50 meters. Subsonic being a big factor. And that influences folks to use different ammo as required so that their bullets were not in the transition zone at the target face. Hence the offering of different speed target ammo in 22lr match ammo. Of course I was not a great 3 position shooter and most of my error was in my wobble, not the possible wobble of my projectiles. At least until I could get prone....

Jeff
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Old 01-03-2005, 11:10 AM
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Re: 308 A.I. at almost 2 miles?

I'm with J. Jones. Maybe I would have to eat crow, but it just sounds like too big of a stretch for such a diminutive case capacity. I would like to see it done. Why don't those guys ever compete at 1000 yard matches? Or better yet, put out a video with no stops so we know there's no Hollywood to the claim.
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Old 01-03-2005, 02:22 PM
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Re: 308 A.I. at almost 2 miles?

I believe Bruce Artus from Pueblo was the feller that made that shot. Maybe...just maybe...the 220SMK survives the sonic transition--im sure it does better than the 168SMK!!

Kregg Slack shoots with Bruce and posts on benchrest.com forums as himself--shoot him an email or PM thru BR.com if in doubt, or call him at the number found here--> www.parrysgunsmithing.com

JB [img]/ubbthreads/images/graemlins/wink.gif[/img]
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