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Posted: 12/10/2010 8:49:37 PM EDT
[#1]
At 3.3" long, wont a 6.5-284 be a single shot in an AR platform? How are people setting these up? I know there was a few 30-06 AR's built a while back but good luck finding one of those to build off of. I just bought a BHW 260 Remington barrel, it's a much slower 6.5 variant.
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Posted: 12/10/2010 9:09:52 PM EDT
[#2]
Im sure it would be an lr platform. I'm sitting here as we speak with 5, 284 (parent case) rounds in a 308 mag. they have 140 grn bullets in them with an oal of 2.788. looks like they should work just fine.
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Posted: 12/10/2010 9:11:56 PM EDT
[#3]
forgot to ask. have you put your 260 together yet?
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Posted: 12/10/2010 11:22:41 PM EDT
[#4]
Ok, guess I don't know nothin' about 6.5-284. I ordered my barrel on the 1st and was told 4weeks. Hopefully they can get it here a little earlier, it would make a swell Christmas gift for me. I still need to order brass and bullets anyway.
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Posted: 12/11/2010 7:55:49 AM EDT
[#5]
Quoted:
Im sure it would be an lr platform. I'm sitting here as we speak with 5, 284 (parent case) rounds in a 308 mag. they have 140 grn bullets in them with an oal of 2.788. looks like they should work just fine. Did you need to change the follower? I have been thinking about building one myself, but, I seem to remember someone saying that the rounds dont feed well. |
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Posted: 12/11/2010 8:25:32 AM EDT
[#6]
I do not have a 6.5-284, but I just built a 6x45 with a Black Hole Weaponry barrel, and it is a Tack driver, and I could not be happier with their barrel, or their customer service, and personal attention.
Ed-u-mcate me, how much faster is it than the 260 Rem, how hard is brass to find? |
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Posted: 12/11/2010 8:43:25 AM EDT
[#7]
you may need to tweak the feed lips on the mag. i'm going to give them a call monday and ask some questions.
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Posted: 12/11/2010 11:17:12 AM EDT
[#8]
Quoted:
I do not have a 6.5-284, but I just built a 6x45 with a Black Hole Weaponry barrel, and it is a Tack driver, and I could not be happier with their barrel, or their customer service, and personal attention. Ed-u-mcate me, how much faster is it than the 260 Rem, how hard is brass to find? The 260 will push a 123gn bullet at about 3000fps out of a 24" bolt rifle, but I have not found numbers for an AR platform. I don't know if I'm being too optomistic but I hope to push 2850-2900fps, I'll let you know in a few weeks. Brass is easy, I'm going to be sizing down Winchester 7mm-08($216 per 500@MidwayUSA) brass but you can use any 308 based casing. I believe the 6.5-284 will do a couple hundred FPS over the 260, but I honestly don't know too much about it. EDIT: LINK TO GOOD ARTICLE ON 260 REMINGTON Sorry greenhornet, didn't mean to hijack this into a 260 thread. |
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Posted: 12/11/2010 1:05:47 PM EDT
[#9]
USMC looked at AR-10 in 6.5-284 for a while some years back but abandoned the idea for various reasons (one being feeding reliability). Most competitive shooters using the 6.5-284 indeed use a longer loaded length than the 308 AR platform will allow - so if you can check your reamer to see if you would have a really long jump to the lands if you loaded to 2.7x" as it may affect accuracy. You may also experience "binding" in the magazine limiting you to perhaps 7 or so rounds in the mag. Final note, the 6.5-284 is loaded to VERY high pressure (68,000 psi) for competition, which then leads to relatively fast throat erosion - on the order of 2000 rounds before the barrel has to be set back. In a bolt gun, not too difficult. On an AR, it can be done, but gets to be a pain...
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Posted: 12/11/2010 1:08:11 PM EDT
[#10]
Quoted: Final note, the 6.5-284 is loaded to VERY high pressure (68,000 psi) for competition, which then leads to relatively fast throat erosion - on the order of 2000 rounds before the barrel has to be set back. In a bolt gun, not too difficult. On an AR, it can be done, but gets to be a pain... I saw one that had 900 rounds on it and was missing about 10" of throat. |
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Posted: 12/12/2010 12:35:07 PM EDT
[#11]
thanks for the input guys, looks like the 260 may be the way to go. brass is cheaper, should feed fine in the 308 mag, lower pressure as marty said, longer barrel life. already have a savage striker in 260 and it's extremly accurate. hey marty, you back in business?
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Posted: 12/12/2010 3:02:48 PM EDT
[#12]
Quoted:
thanks for the input guys, looks like the 260 may be the way to go. brass is cheaper, should feed fine in the 308 mag, lower pressure as marty said, longer barrel life. already have a savage striker in 260 and it's extremly accurate. hey marty, you back in business? Got something sitting here that might catch your fancy .... never went out of business, just have to take some time off every now and then... |
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Posted: 12/12/2010 4:17:27 PM EDT
[#13]
And what might that be sir?
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Posted: 12/12/2010 7:48:55 PM EDT
[#14]
Quoted:
And what might that be sir? SS bead blasted fluted LR barrel in 260 Ackley... need to double check the length... 20 to 24" range IIRC |
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Posted: 12/14/2010 4:08:55 PM EDT
[#15]
hey marty, you recon that case will feed ok in an AR? it's almost strait like the 284 win, alltro not as fat.
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Posted: 12/14/2010 6:43:22 PM EDT
[#16]
.260 Ackley Improved might be what your looking for. It will work fine with out modifications (except for the rechambering). I'm not sure how much velocity you gain, but I think it's around 100fps or so. So your about half-way between the 6.5-284 and the .260. Brass can be purchased and fire formed from .243, .260, 7mm-08, .308, and .338 Federal cases.
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Posted: 12/15/2010 5:05:55 PM EDT
[#17]
Quoted:
hey marty, you recon that case will feed ok in an AR? it's almost strait like the 284 win, alltro not as fat. The way I look at it... 260 has a max pressure which is based on available chamber volume. By making a 260 AI chamber, I give it more breathing room. I plan to size my brass as standard 260, but load to a higher pressure, using my software to guide me. The higher pressure is such that it results in the SAME max pressure in the AI chamber as the max pressure in the standard chamber. This way I maintain feeding reliability, but get the additional FPS. This in addition to simply shooting the AI brass and checking to make sure it feeds without issue. My estimates are indeed about 100 fps over standard 260 loads. |
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