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    Switched AR10 to Carbine buffer with springco, and now I cant get it to lock back?

    ....actually, it depends on the manufacturer of the tube. Aero uses standard AR15 carbine tubes for both their AR15 and AR10 platforms. The differences between the AR15 and AR10 are the springs and buffer for each platform.
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    Need guidance on what to buy primer and powder-wise

    ...just be aware you may end up having different loads for you 223 AR and bolt action, best to separate the brass used in those platforms. Granted, you can find a "common" load that can be used safely for both, but neither would be the "best or better" for the individual rifle.
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    5.56 AR Only Loads

    .... It really comes down to what is available and then working up a good load with that powder (or bullet, primer, casing, etc.)
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    Best Long Range Barrel for 6mm Arc gas gun?

    ....JBM Ballistics predicts both those ammo types will remain supersonic to 1200YDS based on the velocities shown for the 18"er.
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    Best Long Range Barrel for 6mm Arc gas gun?

    .....MOS-TEK did a "FPS by Inch" test with Hornady factory ammo, you may find their data useful in your decision process.
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    Can I use a 6.5CM BCG for a .308 barrel/.308 rounds?

    ....Yes, the bolts (and carrier) for .308WIN and 6.5Creedmoor are interchangeable for AR10's. Note the yellow highlighted case rim info on the diagrams.
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    45 acp loading expertice needed

    ....you might find these to be useful, start low and work up... ...IIRC SAAMI has specs/diagrams for primers as well that you can reference for dimensions, etc.
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    Best muzzle brake for 308

    ...have had good experiences with the VG6 brakes in multiple calibers. Testing before attachment and after showed significant reduction in felt and actual recoil/muzzle jump. Like any brake, they can be loud, something to consider if one is sensitive to sound and subject to flinching as a...
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    Bolt effect on accuracy?

    ....that's common on gas ports of new barrels, which eventually will "smooth over" any downward projecting burrs created during the gas port drilling. That one actually looks like it chipped a bit when the drill/milling bit broke thru. Looking to the left of the picture where the actual port...
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    whats the deal with arken optics?

    ...actually it was 3 territories, Hawaii, Guam and the Philippines were all US Territories during WWII...
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    Brass remains in chamber, bolt locks back. Am I over gassed?

    ....gotta admire the OP's level of patience.
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    Least expensive AR you’d trust your life to?

    ....if and when that "moment" arrives in your lifetime, it may not even have an AR involved... ;)
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    308 Winchester AR Only

    .....well, if you do decide to reload, you already have some of the data parameters answered by replicating the components used in the FGGM, i.e., bullets, brass, primers and the CBTO, COAL, shoulder bump, trim length (easily determined by de-constructing a single FGGM round). The powder used...
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    Winchester Awarded NGSW Ammunition Manufacturing Facility Design Contract

    ....one might think our Gov't would have learned that having a single large manufacturing plant is also a potential single point of failure... ....smaller, decentralized plants could benefit more states/locations/communities in regards to enhanced logistics, distribution, transportation and...
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    5.56 AR Only Loads

    ...assuming that the shoulder bump is sufficient, trim length is sufficient and the bullet seating depth is sufficient so the bullets ogive is not "jamming" into the leade/lands, if the loaded round still won't chamber, then it most likely is a good indicator that the case web hasn't been sized...
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    Run and gun optic

    ....I played around with a Fastfire RD piggy-backed on one of my scopes "just to see", and I would agree with you on it being faster to use in the 12 o'clock orientation. It really worked well (for me) with a natural "heads up", no neck craning or weird contortions of neck or arms. It was...
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    Run and gun optic

    .... that is definitely my class :ROFLMAO:
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    Least expensive AR you’d trust your life to?

    ....my observations at the ranges and in many of the forums posts is pretty much the same as @ebbiv about how/why builds go wrong. ...while I was still in, Uncle Sugar always issued me something that was at least "minute of man" within the range limits of the ammo issued and the platform...
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    Run and gun optic

    ....interesting statement.