ar-15 in 250 savage
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Auburn1992
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Well they already make AR15s in .243 which would probably be a better deal due to how common the ammo is.
R.W.Dale
Member
they make an AR10 in 243win
you can get an AR15 in 243wssm
nobody makes an AR15 in 243win as the cartridge is too long to fit in an AR15 magwell as would 250/3000 as well
you can get an AR15 in 243wssm
nobody makes an AR15 in 243win as the cartridge is too long to fit in an AR15 magwell as would 250/3000 as well
Keep talkin'. I'm interested in getting an upper in something a little stronger than the present 2-300 yard military varmint/plinking/back yard cartridge. I'm just scanning the possibilities right now, and I just don't like the 7.62X39 cartridge. (Equivalent to the .30-30, indeed! Hah!)
So enlighten me.
I only got an AR-15 last week because I don't know anything about them: e.g., what's an Adams Piston? Also, e.g., I learned right away not to handle them with only one pin removed. (Yes, I hinged it down on my index finger --a mini-ouch.)
But right now I'm more interested in the ooomph factor --less than .308 but surely more than the .223 Remington/5.56 NATO varmint/plinking/back yard cartridge. (Yes, I'm aware of the difference btwn .223 and 5.56.)
Two-fifty Savage doesn't sound bad, but I wonder about brass availability.
Basic Desirable Parameters:
2500-2600 f/s mv from an 18-20" bbl with about a 1-10" twist.
130-150 gr bullet of various styles
Equal to or less than a one foot drop at 400 yds with sights 2" above the bore and printing 2-3 inches high at 100 yards.
Commonly available Boxer brass.
I don't like short fat magnums.
The clock radio alarm just went off... I must have been dreaming.
Sorry.
So enlighten me.
I only got an AR-15 last week because I don't know anything about them: e.g., what's an Adams Piston? Also, e.g., I learned right away not to handle them with only one pin removed. (Yes, I hinged it down on my index finger --a mini-ouch.)
But right now I'm more interested in the ooomph factor --less than .308 but surely more than the .223 Remington/5.56 NATO varmint/plinking/back yard cartridge. (Yes, I'm aware of the difference btwn .223 and 5.56.)
Two-fifty Savage doesn't sound bad, but I wonder about brass availability.
Basic Desirable Parameters:
2500-2600 f/s mv from an 18-20" bbl with about a 1-10" twist.
130-150 gr bullet of various styles
Equal to or less than a one foot drop at 400 yds with sights 2" above the bore and printing 2-3 inches high at 100 yards.
Commonly available Boxer brass.
I don't like short fat magnums.
The clock radio alarm just went off... I must have been dreaming.
Sorry.
Last edited:
rangerruck
Member
I allways thought that the savage hi power, a 70 to 75 grain round, doing about 3400 fps from the muzzle, would have been perfect for this, or lets just go back 100 years, and redo the swift to what it really was; the 6mm Lee-navy.
rangerruck
Member
but right now you can get an ar chambered in 243, 260, 6.5 grendel, 6.8 remmy, and 6.5 creedmoor. I personally would take the grendel over all of these, then the 6.8. , then the 243. the others really don't shine until you go 600 yds or more, for their distinct advantage over these other rounds. Also the 6.5 grendel rounds are proly the cheapest.
rangerruck
Member
oh yeah, you can also get it in 6x45, which is the 223 round necked up, fires a 85 to 90 grainer, and is pretty potent, but you really need a 22 inch or longer bbl for these, a shorty bbl, makes these slow out the muzzle, and really limits you for distance, and would give you a rainbow trajectory. Hi standard makes them, and a few other folks make this upper as well. The rounds are also from hi standard, I think. I think they get them from PMC or Armscorp.
230RN said:
I assume you mean 12MOA of drop at 400 yards. .308 Win drops about 2 feet at 400 yards when zeroed 2" high at 100.
The AR-10 in .308 Win is so close to this that you might as well just get one of those. Your specifications seem centered around .30 caliber and there's no .30 cal cartridge (that I know of, anyway) that will fit in an AR-15 and meet the ballistic specs you've listed.
6.5 Grendel will get you close to .308 Win trajectory and energy and fit in an AR-15, but it's going to do it with lighter bullets than you've specified (in the 120gr range). It also uses a faster twist to stabilize the long 6.5mm bullets (why does it matter, as long as it works?). I wouldn't call brass "commonly available" as you're not going to find it at your local sporting goods store, and compared to .223 Rem it's a short, fat magnum (again, I don't see what difference it makes, but to each his own).
6.8 SPC packs significantly more punch (in terms of KE) than .223 Rem, but not as much as 6.5 Grendel. Trajectory is roughly similar to .308 Win. It also runs lighter bullets in the 115gr range, and isn't what I would call common.
If you're set on .30 caliber in an AR-15 there's the .300 Whisper, but it's probably going to fall short of your velocity goals.
R.W.Dale
Member
I can get a 125grn Nosler B-tip up to 2420fps in my 1-10" 20" 7.62x39mm ar15
that's only 80fps and 5 grains shy of you speed and weight parameters
With the zero you cite my load is down 32 inches at the 400yd mark, to have one foot of drop at 400yds you'd need a MV of over 3700fps
brass is very cheap and plentifull
and it's as far from a short fat mag as you can get
BADUNAME37
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Bushmaster M4
I have a Bushmaster M4 (5.56 with 1 in 9 twist).
Does this thread mean I can get another upper for my receiver and turn what I have into another caliber?
If so, would Bushmaster be the best place for me to obtain the new upper?
I answered my own question here:
http://www.bushmaster.com/products.asp?cat=6
I have a Bushmaster M4 (5.56 with 1 in 9 twist).
Does this thread mean I can get another upper for my receiver and turn what I have into another caliber?
If so, would Bushmaster be the best place for me to obtain the new upper?
I answered my own question here:
http://www.bushmaster.com/products.asp?cat=6
You could get an upper from Bushmaster but it looks like their offerings are limited to .223/5.56, 6.8SPC, and .450 Bushmaster. If you want something like 6.5 Grendel or .204 Ruger or 9mm Luger, you'll have to get it from someone else.
There are literally dozens of other chamberings for ARs. There's a pretty exhaustive list in this thread.
There are literally dozens of other chamberings for ARs. There's a pretty exhaustive list in this thread.
Looks like a 6.5 Grendell is a bit shy of your goal.
19.5" barrel sends a 129-grain bullet to 2391 fps.
Conley Precision shows a .250 Savage 120-grain at 2720 fps. (I would guess this is either 22 or 24" barrel.)
19.5" barrel sends a 129-grain bullet to 2391 fps.
Conley Precision shows a .250 Savage 120-grain at 2720 fps. (I would guess this is either 22 or 24" barrel.)
gvnwst
Member
if the 6.5 is too slow, you reload, and you don't mind even lower weight bullets, there is always the
6mmAR Turbo, a necked 6.5 grendel with .243 win ballistics...... less overall energy though. or, make a improved 7.62x39, blow out the case walls, load, and fire away!
6mmAR Turbo, a necked 6.5 grendel with .243 win ballistics...... less overall energy though. or, make a improved 7.62x39, blow out the case walls, load, and fire away!
I don't have the ballistic data for a Two-Fitty but I have data for the 6.5-250 and it comes close to what you want using a 142 MK at 2650 fps. Thus I suspect that a 250 Savage with a 120 grain bullet should do what you want.
Then again as other discussions have shown, the 260 Remington, 6.5X47 and the 6.5 Creedmoor are probably the closest existing answers to your question in an AR-10. For the AR-15 the closest would be the 6.5 Grendel or the 6.8 SPC. I have only a little experience with the 6.5 Grendel and none with the 6.8. I like the Grendel in the AR-15 and it was very accurate.
Then again as other discussions have shown, the 260 Remington, 6.5X47 and the 6.5 Creedmoor are probably the closest existing answers to your question in an AR-10. For the AR-15 the closest would be the 6.5 Grendel or the 6.8 SPC. I have only a little experience with the 6.5 Grendel and none with the 6.8. I like the Grendel in the AR-15 and it was very accurate.
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