Target 20 AR Barrel

baddarryl · November 25, 2017, 12:16 PM

Hi all. I think I am going to start the build of a target AR. All I now is at this point it will be a 20 inch 1:7 or 8 twist with a fixed stock and a Vortex 4-12 Diamondback on top.

Those that run 20 inch barrels do you typically run 7 or 8 twist? Most barrels are the 8 twist. Also I am seriously thinking of getting the R rifling. Have you found this beneficial with heavier bullets? I am going to build this to run out to 600 and for Appleseed, but if I can get into consistent 2 MOA shooting with a sling I will look at branching out into other competitions. That is what this build is really in mind for. Thanks.

Ifishsum · November 25, 2017, 04:33 PM

I like 8 twist (I guess Krieger is actually 1:7.7" but closer to 8 than 7) no trouble with 80gr bullets out to 600. I have not tried a R rifled barrel yet

Nathan · November 25, 2017, 09:15 PM

My 20" build is a 1:8 mid weight WOA barrel.

I would get that, or the Larue Stealth.....it has a solid rep.

My plan is to develop a Hornady 75 gr load.

bacardisteve · November 27, 2017, 06:14 PM

My Kreiger is a 7.7 works wonderfully. It really likes the Hornady 75gr bthp in front of 44 grains of varget. Haven't shot farther than 600yds with it but it stays supersonic to 1000yds.

444 · November 27, 2017, 08:10 PM

I have a 1 in 8 twist WOA barrel and it loves 77 grain SMK.

I really don't think you will go wrong with either. It sounds like you are looking for serious accuracy. Pay up for the barrel. Get the best barrel you can possibly afford. This isn't the place to try to save money.

I have never used R rifling

Ifishsum · November 28, 2017, 03:02 AM

Bacardisteve did you possibly mean 24gr? :P

bfoosh006 · November 28, 2017, 10:43 AM

I have fired my Krieger 7.7n1 twist to 794yds with Hornady steel match on a mansized torso steel silhouette.

I would suggest you buy the highest quality barrel you can afford.

After all, accuracy is what you seek... and a missed shot is money down the drain.

I would also true up the receiver face and Loctite in the barrel with what Criterion uses... Loctite 609

"Loctite ® 609™ is a low viscosity, rapid-curing anaerobic adhesive that augments the strength of press fit assemblies or slip fit assemblies up to 0.005"in diameter. Adds up to 3,000 psi holding power. Recommended for parts that will need subsequent dismantling, i.e., retention of bearings onto shafts and into housings."

4EVERM-14 · November 28, 2017, 03:15 PM

Another option is Douglas.
Have had good luck with them for several years. 1-8 twist

bacardisteve · November 28, 2017, 06:09 PM

Ha yeah I meant 24gr of varget must have had 308 on my brain from earlier in the day.

kraigwy · November 29, 2017, 01:09 PM

Its gonna be real hard to beat White Oak

November 25, 2017, 12:16 PM	#1
baddarryl Senior Member Join Date: March 29, 2011 Location: Cape Fear! Posts: 1,683	Target 20 AR Barrel Hi all. I think I am going to start the build of a target AR. All I now is at this point it will be a 20 inch 1:7 or 8 twist with a fixed stock and a Vortex 4-12 Diamondback on top. Those that run 20 inch barrels do you typically run 7 or 8 twist? Most barrels are the 8 twist. Also I am seriously thinking of getting the R rifling. Have you found this beneficial with heavier bullets? I am going to build this to run out to 600 and for Appleseed, but if I can get into consistent 2 MOA shooting with a sling I will look at branching out into other competitions. That is what this build is really in mind for. Thanks.

November 27, 2017, 06:14 PM	#4
bacardisteve Senior Member Join Date: September 5, 2006 Location: West virginia Posts: 653	My Kreiger is a 7.7 works wonderfully. It really likes the Hornady 75gr bthp in front of 44 grains of varget. Haven't shot farther than 600yds with it but it stays supersonic to 1000yds. __________________ Kill em all and let God sort em out! USAF

November 27, 2017, 08:10 PM	#5
444 Senior Member Join Date: November 20, 2000 Location: Ohio Posts: 3,968	I have a 1 in 8 twist WOA barrel and it loves 77 grain SMK. I really don't think you will go wrong with either. It sounds like you are looking for serious accuracy. Pay up for the barrel. Get the best barrel you can possibly afford. This isn't the place to try to save money. I have never used R rifling __________________ You know the rest. In the books you have read How the British Regulars fired and fled, How the farmers gave them ball for ball, From behind each fence and farmyard wall, Chasing the redcoats down the lane, Then crossing the fields to emerge again Under the trees at the turn of the road, And only pausing to fire and load.

November 28, 2017, 03:15 PM	#8
4EVERM-14 Senior Member Join Date: November 12, 2006 Location: Pennsy Posts: 720	Another option is Douglas. Have had good luck with them for several years. 1-8 twist __________________ David NRA Benefactor Member Distinguished Rifleman #731 Presidents 100

November 28, 2017, 06:09 PM	#9
bacardisteve Senior Member Join Date: September 5, 2006 Location: West virginia Posts: 653	Ha yeah I meant 24gr of varget must have had 308 on my brain from earlier in the day. __________________ Kill em all and let God sort em out! USAF

November 25, 2017, 04:33 PM	#2
Ifishsum Senior Member Join Date: September 15, 2005 Location: Oregon Posts: 1,033	I like 8 twist (I guess Krieger is actually 1:7.7" but closer to 8 than 7) no trouble with 80gr bullets out to 600. I have not tried a R rifled barrel yet

November 25, 2017, 09:15 PM	#3
Nathan Senior Member Join Date: July 1, 2001 Posts: 6,331	My 20" build is a 1:8 mid weight WOA barrel. I would get that, or the Larue Stealth.....it has a solid rep. My plan is to develop a Hornady 75 gr load.

November 28, 2017, 03:02 AM	#6
Ifishsum Senior Member Join Date: September 15, 2005 Location: Oregon Posts: 1,033	Bacardisteve did you possibly mean 24gr? :P

November 28, 2017, 10:43 AM	#7
bfoosh006 Senior Member Join Date: February 17, 2009 Posts: 1,089	I have fired my Krieger 7.7n1 twist to 794yds with Hornady steel match on a mansized torso steel silhouette. I would suggest you buy the highest quality barrel you can afford. After all, accuracy is what you seek... and a missed shot is money down the drain. I would also true up the receiver face and Loctite in the barrel with what Criterion uses... Loctite 609 "Loctite ® 609™ is a low viscosity, rapid-curing anaerobic adhesive that augments the strength of press fit assemblies or slip fit assemblies up to 0.005"in diameter. Adds up to 3,000 psi holding power. Recommended for parts that will need subsequent dismantling, i.e., retention of bearings onto shafts and into housings."

November 29, 2017, 01:09 PM	#10
kraigwy Senior Member Join Date: June 16, 2008 Location: Wyoming Posts: 11,061	Its gonna be real hard to beat White Oak __________________ Kraig Stuart CPT USAR Ret USAMU Sniper School Distinguished Rifle Badge 1071