Centurion Arms Lightweight Barrel Accuracy

[ggammell]

I made a mistake. I’m actually shooting PPU M193. Not sure if this is true to spec or not.

What would a good starting point be as far as selecting a round that may perform better. M855? I’m not looking for match stuff just something that’ll shoot better than 4 MOA.

M855 is not for any precision use. Full stop. Get some American Eagle or any other flavor of quality American 55gr.

[Cincinnatus15]

How many rounds have you out through the barrel? The accuracy could change after the first 500 rounds in my experience.

Also just like others mentioned above, don't worry about your groups if your using a Holo sight or red dot. I have seen some people shoot 1 MOA with irons, but that is outstanding and not common.

I have around 200 rounds or so I would say..

I managed 4-5 MOA using a red dot on a particular rifle shooting 193. I switched to an ACOG and immediately tightened up to 2MOA with the same ammo.

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Thanks. I have around 200 rounds or so I’d say through the barrel.

[Cincinnatus15]

M855 is not for any precision use. Full stop. Get some American Eagle or any other flavor of quality American 55gr.

Alright will do. I’ve just read a heavier bullet may perform better with the 1:7.

[Coal Dragger]

Regardless of what I intend to use a 5.56mm carbine for, I will test it with a magnified optic and good match quality ammo that is appropriate for the twist rate of the barrel.

OP if you have a magnified optic and want to see what the carbine can do, mount the scope and go find a box or two of match ammo and shoot some 10 shot groups or 5 shot groups if 10 shot groups are too much for you. Then you will know what the barrel is capable of if you ever need to press it into a different role.

My Colt, DD, and KAC will all hold right around .9-1.2 MOA at 100 yards with good match ammo for 10 shots if I can keep my concentration up long enough to shoot a clean 10 shot string. That’s with 15X Nightforce on top handling aiming duty. I don’t use that optic on any of the carbines for anything but testing because it’s huge and heavy, but it’s worth knowing if I’m getting trash results because of ammo, sights, or the barrel. I have yet to see a quality barrel running quality ammo fail to turn in nice groups with a decent magnified optic. So I don’t sweat it when I get 4 MOA groups out of the same gun when I’m running blaster practice ammo out of it with a red dot.

[crosseyedshooter]

Here's my best group with a Centurion Arms 16" lightweight barrel at 100 yards with a 3-15x Vortex scope. This was PMC Bronze .223 55gr.

[turnburglar]

To the OP; a few comments:

1. M193 is not match grade ammunition. Even if other posters have 1 or 2 good groups to post; I'd be willing to bet they cant do that on command; like a mk262 load can.

2. Most people posting good groups are using magnified optics. The higher the magnification the easier it is to get a consistent POA.

3. Are you using a bipod or front/rear bags? They matter a lot.

4. Are you a good bench rest shooter? I was NOT when I started, but with practice am much more consistent now. Still not perfect, but more consistent.

[Swstock]

2 moa dot with 3 moa ammo.....just saying

[Cincinnatus15]

To the OP; a few comments:

1. M193 is not match grade ammunition. Even if other posters have 1 or 2 good groups to post; I'd be willing to bet they cant do that on command; like a mk262 load can.

2. Most people posting good groups are using magnified optics. The higher the magnification the easier it is to get a consistent POA.

3. Are you using a bipod or front/rear bags? They matter a lot.

I’m just shooting off of a backpack and a bench

4. Are you a good bench rest shooter? I was NOT when I started, but with practice am much more consistent now. Still not perfect, but more consistent.

Not sure how good I am but I was able to shoot 2 inch groups at 100 with A 6920, wolf gold, and an Aimpoint PRO

[Stickman]

Not sure how good I am but I was able to shoot 2 inch groups at 100 with A 6920, wolf gold, and an Aimpoint PRO

So use that ammo and optic and see how it does, because the only thing I'm seeing is apples and oranges. You need to clean up some variables.