gmantwo Posted September 23, 2012 Share Posted September 23, 2012 I've built a new AR on a Sundevil Multi-Caliber receiver. The barrel I bought is a Wilson 18" stainless and is very heavy. From behind the gas block to the barrel nut is 1.05, from the gas block forward it is .840. I'm wanting to take some weight off and thread the barrel for a break. The gun/barrel is very accurate and I certainly don't want to lose that. What diameter should I go to? I'm thinking .840 for the rearward portion and .750 forward. Is that too small? Or should I go even smaller? I would love to have the barrel fluted, but not sure who does that to AR barrels they didn't sell. Thanks Link to comment Share on other sites More sharing options...
benny hill Posted September 23, 2012 Share Posted September 23, 2012 Save money and sell it and buy a criterion 18" light profile for under $300.00 Link to comment Share on other sites More sharing options...
FightFireJay Posted September 23, 2012 Share Posted September 23, 2012 This guy seems reasonable.... http://www.adcofirearms.com/shopservices/shop_.cfm?code=21 Link to comment Share on other sites More sharing options...
carbon9 Posted September 23, 2012 Share Posted September 23, 2012 Both of the above are valid choices, personally I would pass on the fluting and just do .750 for the whole length of the barrel except for a small raised area to seat the gas block against. Link to comment Share on other sites More sharing options...
warpspeed Posted September 23, 2012 Share Posted September 23, 2012 From a money and ease stand point, Benny has the best advice. ADCO does great work but it is going to cost $ 175 plus shipping not to mention the turn around time. I was in the same position as you but the barrel was already threaded so it was just a reproflie. I had mine turned to 0.750" in front of the FSB and just under 0.7" under the handguard. Link to comment Share on other sites More sharing options...
gmantwo Posted September 25, 2012 Author Share Posted September 25, 2012 Hmmm. Well I really like the dimples, not sure how much weight that would remove. His prices are well within line also Probably going to stay with this barrel, extremely accurate, even at 600, the farthest I've shot it so far. Even with the 3-4lb trigger it still has in it. If I have it turned only, the local gunsmith can easily do that, and will only charge me $40-50. .750 sounds like what I need to go to if I do that. Thanks Link to comment Share on other sites More sharing options...
shooter545 Posted September 25, 2012 Share Posted September 25, 2012 What Benny said. Barring that have it turned to .750 for the whole thing and you will be fine. Link to comment Share on other sites More sharing options...
redial Posted September 25, 2012 Share Posted September 25, 2012 If you're going to recontour a finished barrel, take a tip from the Anschutz crowd and leave the last few inches to the muzzle at full diameter. You'll retain the original bore dimensions (and the barrel's intrinsic accuracy), lose the weight and still have a position-stabilizing "dog knot" out on the end. Understand please that I'm one of those people who get all bundled up in sweatshirts and straight jackets and try to be very, very still when shooting so my opinion may be irrelevant for your project. Mark Link to comment Share on other sites More sharing options...
MarkCO Posted September 25, 2012 Share Posted September 25, 2012 I'd go with the suggestion to sell the barrel and buy a new one. I've seen more than on barrel that shot great groups go to patterns after a local gunsmith turned down the barrel. The Nordic barrels are pretty close to what you want... 0.800 after chamber taper to gasblock shoulder, 0.750 gasblock, 0.740 forward of the gasblock. They are very accurate and at $269, a pretty good deal. Link to comment Share on other sites More sharing options...
P.E. Kelley Posted September 25, 2012 Share Posted September 25, 2012 Go with what Benny and MarkCO have said. Buy a new barrel configured as you want. Unless the barrel is turned perfectly concentric bore to outside diameter you will have problems with accuracy, especially as the barrel heats up. Link to comment Share on other sites More sharing options...
assaulter Posted September 25, 2012 Share Posted September 25, 2012 I'd go with the suggestion to sell the barrel and buy a new one. I've seen more than on barrel that shot great groups go to patterns after a local gunsmith turned down the barrel. The Nordic barrels are pretty close to what you want... 0.800 after chamber taper to gasblock shoulder, 0.750 gasblock, 0.740 forward of the gasblock. They are very accurate and at $269, a pretty good deal. And free shipping! Link to comment Share on other sites More sharing options...
Ten-X Posted September 25, 2012 Share Posted September 25, 2012 I've watched people spend really good money on barrels that just won't shoot. I had a good barrel and sent it to adco for flutes and threads. Came back lighter and even more accurate than when I sent it off. I don't think that Adco made it more accurate. That I attribute to more precision in the gas tube fit to the carrier but it is exactly what I wanted nonetheless. If you have a good performer then you should stick with it IMHO. I am not looking forward to when I shoot this barrel out and have to take my chances on a new one. Link to comment Share on other sites More sharing options...
warpspeed Posted September 25, 2012 Share Posted September 25, 2012 I've watched people spend really good money on barrels that just won't shoot. I had a good barrel and sent it to adco for flutes and threads. Came back lighter and even more accurate than when I sent it off. I don't think that Adco made it more accurate. That I attribute to more precision in the gas tube fit to the carrier but it is exactly what I wanted nonetheless. If you have a good performer then you should stick with it IMHO. I am not looking forward to when I shoot this barrel out and have to take my chances on a new one. The accuracy likely came from the new crown. Link to comment Share on other sites More sharing options...
APL-G35 Posted October 4, 2012 Share Posted October 4, 2012 Well after reading this I decided to ignore all common sense. Being a machinist I turned my barrel to .790 behind the gas block and .715 out front. Tomorow I'll probably double flute the thing. If I mess it up I'll order a black hole weaponry barrel. If all goes right, happy deal I've got a slick barrel with no money invested. Just some sweat equity Link to comment Share on other sites More sharing options...
gmantwo Posted October 8, 2012 Author Share Posted October 8, 2012 If it works, want to do another? Just for the practice, you know Link to comment Share on other sites More sharing options...
APL-G35 Posted October 8, 2012 Share Posted October 8, 2012 Haha, some of the guys at work are already making requests. I ended up double fluting it and think the weight from 42.5 oz down to 35oz. It will probably be awhile until I get to shoot it since I'm waiting on a handguard. Link to comment Share on other sites More sharing options...
dmshozer1 Posted October 8, 2012 Share Posted October 8, 2012 Save money and sell it and buy a criterion 18" light profile for under $300.00 Is it a chrome lined barrel? Link to comment Share on other sites More sharing options...
rkgsmith Posted October 12, 2012 Share Posted October 12, 2012 I would be very careful about letting somebody just turn it down without the proper tools. By that I mean a machine that is completely liquid cooled and flooded. Heat from turning will kill a barrel. Contact Compass Lake about turning. They did mine from a blank and fitted a bolt for $120. And it's .75 moa all day long. Link to comment Share on other sites More sharing options...
OkCorey Posted October 12, 2012 Share Posted October 12, 2012 Save money and sell it and buy a criterion 18" light profile for under $300.00 As I was reading I was not paying attention to names I thought "hey that's what Benny recommended at the Arkansas multigun sectional" as I got further down I realized oh Benny was the poster. Glad I got to meet Benny he give me a lesson in how to adjust the Rolling Thunder. Link to comment Share on other sites More sharing options...
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