• Winner! Quick Shot Challenge: What’s the dumbest shooting myth you’ve heard?

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    New 6mm Advanced Rifle Cartridge

    Thank you @Yondering. I have a lot to learn about ARs -- I know. Glad you added some examples of where my observations are not necessarily the right conclusion. I always shoot suppressed to minimize the complaining from neighbors which necessitates the use of adjustable gas blocks. My method...
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    New 6mm Advanced Rifle Cartridge

    @TexasRL: I am a big fan of Varget but don't think that it is a good powder for 103 grain and heavier projectiles in our 6mm ARCs. I wanted it to work but always hit pressure before minimum target MV. Just not enough energy to get them going fast enough. If mid 2500 FPS works for you then...
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    New 6mm Advanced Rifle Cartridge

    By default, I guess I've settled on CFE 223--that was good insight on your part. The weather is getting much cooler here in Georgia--it was 36 degrees this morning--and I am curious to see what that will do to MV and what adjustment in charge weight will be necessary. I have not hunted with...
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    New 6mm Advanced Rifle Cartridge

    Took the 6mm ARC hunting yesterday and brought along a 6.5 Creedmoor bolt rifle. Never unzipped the bolt gun's case! Harvested 4 small to medium sized Georgia does. Shot distance was from 100 yards to 250 yards using the Hornady 108 ELD-M with a muzzle velocity of 2670. Three dropped at the...
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    New 6mm Advanced Rifle Cartridge

    @jbailey: That's a good looking AR and promising accuracy results as well. It is decidedly fun to hit steel at long distance with such a lightweight and low recoiling rifle. Looking forward to reading more about your load development results. Henryrifle
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    New 6mm Advanced Rifle Cartridge

    @ormandj: That data looks good from the 108s especially so, knowing that your barrels will speed up 20. to 30 FPS. I do want to understand the shim comment. Are you making reference to shims between the barrel extension and upper or do you mean the shim trick between the front pivot lug and...
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    New 6mm Advanced Rifle Cartridge

    Was at the range today practicing for a match this weekend and decided to squeeze in a few groups of 6mm ARC. The temperature was 75 degrees, presenting a good opportunity to test 29.0 grains of CFE. I started off with the slower 28.3 grain load that has consistently shot in the .7s. The...
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    New 6mm Advanced Rifle Cartridge

    @ormandj: I have been waiting what seems like a month of Sundays for some data from you :) I'd be happy if you duct taped a Celestron C5 spotter on there. Come on man...
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    New 6mm Advanced Rifle Cartridge

    I'll be really interested to know what length and kind of barrel the first person who says they shot factory ammo into a .5 MOA group. My experience has been a little worse than yours though the SDs of the factory ammo have been reasonable with the 105 Black and single-digit-good for the 108...
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    New 6mm Advanced Rifle Cartridge

    Good velocity and a great looking rifle! My 21.75" Wilson barrel shoots that same ammo between 2700 and 2707 FPS with SDs between 17 and 21 FPS. How does it group? Mine shoots that between 1.1 MOA and 1.5 MOA at 100. Have not shot that ammo past 100. Henryrifle
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    New 6mm Advanced Rifle Cartridge

    Shot a few groups today to test increased charges of CFE223 and the effect of cooler weather on known charges . The temperature was 68 degrees, 12 degrees cooler than I have previously shot with this rifle (80 degrees). My baseline charge is 28.3 grains which yields a consistent 2600 FPS +/-...
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    New 6mm Advanced Rifle Cartridge

    After calling around today I found a pound of AR-Comp. It looks like that powder is a good bit faster than CFE223. Using the same calibrations I've used for Varget and CFE223, Quickload estimates the maximum charge just at 52K PSI is 24.7 grains. Going to back off of that a bit and see if...
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    New 6mm Advanced Rifle Cartridge

    Cleaned the 6mm ARC this afternoon and thought I'd put up a pic of the bolt. A little over 400 rounds on it. CFE223 is dirty but pretty easy to clean. Also interesting that gas port erosion has not gotten any worse in the last 150 rounds. Was almost afraid to look. Bot Pics: Henryrifle
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    New 6mm Advanced Rifle Cartridge

    Totally agree. We are all saying the same thing. 6mm ARC is another new and interesting SAAMI cartridge with its own set of strengths and weaknesses. And, WOA has a great reputation for making and building competition components, and, at this time, does not want to get involved with this...
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    New 6mm Advanced Rifle Cartridge

    With no intent to be argumentative, I read the WOA statement as saying that their experience with cartridges like the 6mm ARC when pushed* put more wear and tear on the bolt and bolt extension than they are comfortable with—for competition—their primary focus. What makes the 6mm ARC potentially...
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    New 6mm Advanced Rifle Cartridge

    I like your style! Can't wait to read about performance and especially at the AR Comp! I guess I have to go clean mine now. Good luck with them, Henryrifle
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    New 6mm Advanced Rifle Cartridge

    Good luck with you new barrel, LRBuck. It can be very satisfying to assemble your own rifle, build, test and refine your own ammo and achieve your accuracy and purpose objectives. Looking forward to reading about your results. Anyone testing with AR-Comp and 105 to 108 grain projectiles in an...
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    New 6mm Advanced Rifle Cartridge

    I got a hall pass and dashed out to the range to retest the seating depths that looked so promising from above. Some days I am just off and I knew right away today was one of those days. No excuses though. I know I pulled one shot in the 5th group but once I retrieved the target I realized...
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    New 6mm Advanced Rifle Cartridge

    Attached photo is one of my reloads that measures 2.2540" OAL. At most it is .006" shorter than a factory loaded round. That's a lot of projectile below the neck! @tomcatfan: the CFE223 load that I am working with at 28.2 to 28.3 grains is .9 grain lower than Hornady's published max. I think...
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    New 6mm Advanced Rifle Cartridge

    Spent some time at the range today testing two changes. Wanted to verify that changing from CCI BR4 primers that I want to conserve for competition to CCI 400s was as much of a non-event as initial testing indicated. That remains true even in temperature that is 7 degrees cooler than the last...
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