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    • #29702
      WCM
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      I have a Rock River Varmint 20″ upper on my Colt.
      So far I am getting best accuracy with Sierra 69gr Match King bullets and Vit N140 powder.
      The rifle has a 1:8″ twist.
      It is extremely accurate.

      Do any of you have any suggestions for other match grade bullets that might work as well?

    • #29703
      Larry Gibson
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      Hornady 75 gr match (standard or SST in your 8″ twist…standards with 9″ twist) over 24.5 gr Varget.

      Larry Gibson

    • #29704
      WCM
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      Larry Gibson;n9213 wrote: Hornady 75 gr match (standard or SST in your 8″ twist…standards with 9″ twist) over 24.5 gr Varget.

      Larry Gibson

      Do your bullets hold fine without a cannelure .I have the tapered crimp dies. I have never used small base dies, but I don’t shoot any once fired military brass either.

    • #29705
      Larry Gibson
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      WCM;n9215 wrote:

      Do your bullets hold fine without a cannelure .I have the tapered crimp dies. I have never used small base dies, but I don’t shoot any once fired military brass either.

      Yes, they hold fine. I also have shot thousands of 52 gr HPs (Speer, Hornady and Sierra’s), 55gr Sierra BKs and 68/69 Hornady/Sierra’s out of numerous ARs and other 223/5.56 gas guns w/o needing to crimp.

      Larry Gibson

    • #29706
      WCM
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      Midway is running a sale on the 75 gr Hornady match bullets for $152.99 a thousand.
      I may order a box.
      The Sierra 69’s are amazing out of my rifle.

    • #29707
      Doc Highwall
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      Try some of the 77 grain Sierra’s over a charge of Varget.

    • #29708
      WCM
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      Bullets.com has good prices on Sierra bullets.
      I don’t like Sierra bullets for hunting, but for targets ,they are hard to beat.

    • #29723
      Larry Gibson
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      Another consideration for ARs;

      The longer 75+ gr VLD types are mostly seated long a are single feed in ARs. The 69 MK and standard Hornady 75 match bullets can be loaded to mag length.

      Larry Gibson

    • #29724
      WCM
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      I think I will stick with the 69 and 75 gr bullets.
      I think Varget is very close to N 140 and Rel 15
      I have had good luck with Benchmark and H4895 using 60 and 62 gr bullets.

    • #31503
      WCM
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      Got the Rock River cooking good today.
      I got one half MOA at 225 yds for five shots and my son shot about three quarters MOA for five shots.

      Best load so far is 24.5 gr of N140 and the Sierra 69.

      I am going to work some more with the Sierra 77 ,but so far they are not shooting with the 69’s at 225 yds.

    • #31531
      Goodsteel
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      Good shooting fellers. Great information.
      my 2c worth is my house test load.
      77 grain SMK with a max load of 4895, or Varget, (depending on twist rate, I use the Berger 55 for the slow twist).
      If it doesn’t try to shoot with that, then something is wrong.

    • #31533
      WCM
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      Goodsteel;n11695 wrote: Good shooting fellers. Great information.
      my 2c worth is my house test load.
      77 grain SMK with a max load of 4895, or Varget, (depending on twist rate, I use the Berger 55 for the slow twist).
      If it doesn’t try to shoot with that, then something is wrong.

      We were shooing 24.5 grs of Varget and the 77 Sierra. The rifle wasn’t grouping tight at 225yds.
      I am wondering if my 1:8 twist is stabilizing that bullet.

      I will load some 4895,and N140 today and shoot it again tomorrow.

      Then I should have a better picture of what is going on.

    • #31555
      Goodsteel
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      Of course it is, but any number of things can jack with it. Remember, I’m working with bolt action rifles here with very tight chambers and vety good quality barrels. It’s not the same thing I don’t guess.
      I personslly own an AR, nor have I ever loaded for one (actually, I own nothing smaller than 30 caliber except the 270 my uncle left me) so I’ll bow out of the conversation. Larry and Sarge can give much better advice than I can.

    • #31563
      sundog
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      I shoot a Rock River National Match for NRA High Power. Exceptionally fine rifle and easy to shoot. It shoots better than I can. We shoot reduced course at 200 yards. My load is 69 gr Sr BTHP over and appropriate charge of 2230-C. I very regularly shoot expert scores. A friend of mine (quite a bit younger with much better eyes) shoots the same bullet and regularly shoots master scores. His dad shoots on par with me with the same bullet.

    • #31564
      WCM
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      sundog;n11747 wrote: I shoot a Rock River National Match for NRA High Power. Exceptionally fine rifle and easy to shoot. It shoots better than I can. We shoot reduced course at 200 yards. My load is 69 gr Sr BTHP over and appropriate charge of 2230-C. I very regularly shoot expert scores. A friend of mine (quite a bit younger with much better eyes) shoots the same bullet and regularly shoots master scores. His dad shoots on par with me with the same bullet.

      I am thinking the 69 Sierra is the bullet for my rifle.

      I have plenty of 77 so I will try to make them shoot too as I would like to shoot the rifle at 600yds.

    • #31579
      WCM
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      Yep, I would say my rifle doesn’t like the 77’s

      The 69’s are what I will shoot.

      There are different degrees of stabilization.
      Just because a bullet isn’t key holing doesn’t mean it is perfectly stabilized.

      I can get three inch groups at 225 yds with the 77 gr bullet, and one inch groups with the 69’s

      I bet the 77’s will shoot good in my 1:7 twist Colt.

    • #32460
      WCM
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      Just loaded some rounds with the 77 gr Sierra and Ramshot TAC powder.
      It is an interesting ball powder made in Belgium. It has a burn rate close to H4895.

      Will test the rifle at 225 yds with two shooters.

      I am hopeful .

    • #32488
      Goodsteel
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      Awaiting groups with baited breath my friend.

    • #33150
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      Finally tested the TAC with the 77 gr Sierras today.
      24 grs looks promising with me and my son getting 3/4 MOA groups at 200 yds.

      23.5 grs didn’t shoot as well.

    • #33166
      Goodsteel
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      Cool! That’s a darn good start.

    • #33172
      WCM
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      The Ramshot TAC is the best powder I have tried so far using the Sierra 77 gr bullets.
      I will load fifty more rounds and test the 24 gr load more thoroughly.
      I like getting my son to shoot groups, so we have two different people to compare the load.

    • #33193
      Scharfschuetze
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      To be honest, just about any of the match grade bullets from Nosler, Hornady, Sierra and others will shoot well in the AR platform. The 223 is also very amenable to a wide range of mid to slightly slow powders under these heavy bullets. My favorite? Don’t really have one, and I’ve got lots of all the above waiting to get loaded. I’ll probably go with the Hornady 75 grain bullets this coming NM season. My favorite prairie dog bullet in the AR with a 1 in 9 or 1 in 8 twist is the 60 grain Hornady over Winchester 748 powder. With its flat base, it should shoot well in a 1 in 12″ barrel, but I use the 53 grain Sierras in those.

      Your choice of VV140 for the 77 grain bullet is a good one. I’ve used it with success with the 80 grain Sierra MK in a 1 in 7″ twist barrel, but I think that the 75 or 77 grain weights are more useful over the NM course of fire.

    • #33225
      Sgt. Mike
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      WCM,

      Sierra 77grs and Win 748 used to work, but TAC yields better velocity and consistency, next runner up would be AA-2520 somewhere between 22 to 23.8grs with the same bullet. Might be able to run a little bit hotter (not much). IF going to a 80 grainer AA2520 will net a bit higher than TAC usually, but in the 77grs and below TAC will usually net a better result in the speed department

      Another good load (77gr Sierra) consistent sits at VV N140 about 24.1grs range but work up to it. Some chambers I’ve used will pressure out at 24.4 to 24.5ish grs Like always caution is the word of the day.

      my favorite load? 69 gr sierra around 25grs of Varget is a work horse load
      For slow twist 12/14 the 50’s grains work on varmint just turn them loose as several powder work well ( TAC, VV N133, 748 just to throw out a few)

    • #33246
      WCM
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      My favorite load in the Rock River so far is the Sierra 69 and 24.5 of N 140.
      My rifle has the Wylde chamber.

    • #33297
      WCM
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      Went to my LGS today and found some AR Comp powder.
      The strange thing is one bottle was marked $26, one was marked $32 and one was marked $36

      Of course I picked up the one marked $26 and told the store what they had done.
      The register came up $36 but they let me have it for $26.

      I also bought a bottle of Trail Boss,and Lever Evolution.
      All these are powders I have not tried.

    • #33429
      Phil
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      I have good results with Hornady 68 gr match bullets, H4895 powder, Tula 5.56 primers and MIL brass in my 1:9 rifles.

    • #33430
      WCM
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      H 4895 and Benchmark are indeed great choices for the lighter bullets .
      I use those for the 60 and 62 gr bullets as well.

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