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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Shorty .223AI Velocity
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<blockquote data-quote="436" data-source="post: 1724331" data-attributes="member: 16609"><p>Well, I do understand what you're asking, I was just trying to parallel cartridge relationship with shorter barrels even with a larger capacity case, perhaps a bad example on my part. So, unless there is a .223 AI shooter that worked the ballistical solution you've asked about'..., it's pretty much a crapshoot.</p><p>Perhaps comparing with something that might be as close, but... I know not the same would help.</p><p></p><p><strong><a href="http://i.viglink.com/?key=8fcc9821a6177ea037cedd9cbd90bc00&insertId=ba0673514bae8ccd&type=KW&exp=60%3ACI1C55A%3A20&libId=k1ayv01901013tmk000DAbyyead80&loc=https%3A%2F%2Fwww.thefirearmblog.com%2Fblog%2F2015%2F06%2F09%2Fblack-hills-77-grain-tipped-matchking-precision-5-56mm-ammo%2F&v=1&iid=ba0673514bae8ccd&opt=true&out=https%3A%2F%2Fwww.brownells.com%2Fammunition%2Frifle-ammo%2F5-56x45mm-nato-77gr-tipped-matchking-ammo-prod103294.aspx&ref=https%3A%2F%2Fwww.google.com%2F&title=Black%20Hills%2077%20grain%20Tipped%20MatchKing%20Precision%205.56mm%20Ammo%20-The%20Firearm%20Blog&txt=%3Cspan%3EBlack%20%3C%2Fspan%3E%3Cspan%3EHills%20%3C%2Fspan%3E%3Cspan%3E77%20%3C%2Fspan%3E%3Cspan%3Egr%20%3C%2Fspan%3E%3Cspan%3ETMK%3C%2Fspan%3E" target="_blank">Black Hills 77 gr TMK</a> Muzzle Velocity:</strong></p><p>14.5 inch barrel: <strong>2589.4</strong> FPS avg.</p><p>(Daniel Defense and BCM lightweight hammer forged chrome lined, carbine & mid-length gas system)</p><p>16 inch barrel: <strong>2683.1</strong> FPS avg.</p><p>(BCM C8 SFW heavy profile chrome lined barrel w/ Simon steel sleeve, carbine-length gas system)</p><p>18 inch barrel: <strong>2687.5</strong> FPS avg.</p><p>(<a href="http://www.rainierarms.com/rainier-arms-select-5-56mm-medcon-barrel-18" target="_blank">Rainier Arms Select Medcon stainless polygonal rifling</a>, mid-length gas system)</p><p>18 inch barrel: <strong>2712.5</strong> FPS avg.</p><p>(BCM Mk12 SPR heavy profile stainless steel, rifle-length gas system):</p><p></p><p>Now, thinking about your question; perhaps 18" inch barrel might be the magic sweet spot for your project. Good luck.</p></blockquote><p></p>
[QUOTE="436, post: 1724331, member: 16609"] Well, I do understand what you're asking, I was just trying to parallel cartridge relationship with shorter barrels even with a larger capacity case, perhaps a bad example on my part. So, unless there is a .223 AI shooter that worked the ballistical solution you've asked about'..., it's pretty much a crapshoot. Perhaps comparing with something that might be as close, but... I know not the same would help. [B][URL='http://i.viglink.com/?key=8fcc9821a6177ea037cedd9cbd90bc00&insertId=ba0673514bae8ccd&type=KW&exp=60%3ACI1C55A%3A20&libId=k1ayv01901013tmk000DAbyyead80&loc=https%3A%2F%2Fwww.thefirearmblog.com%2Fblog%2F2015%2F06%2F09%2Fblack-hills-77-grain-tipped-matchking-precision-5-56mm-ammo%2F&v=1&iid=ba0673514bae8ccd&opt=true&out=https%3A%2F%2Fwww.brownells.com%2Fammunition%2Frifle-ammo%2F5-56x45mm-nato-77gr-tipped-matchking-ammo-prod103294.aspx&ref=https%3A%2F%2Fwww.google.com%2F&title=Black%20Hills%2077%20grain%20Tipped%20MatchKing%20Precision%205.56mm%20Ammo%20-The%20Firearm%20Blog&txt=%3Cspan%3EBlack%20%3C%2Fspan%3E%3Cspan%3EHills%20%3C%2Fspan%3E%3Cspan%3E77%20%3C%2Fspan%3E%3Cspan%3Egr%20%3C%2Fspan%3E%3Cspan%3ETMK%3C%2Fspan%3E']Black Hills 77 gr TMK[/URL] Muzzle Velocity:[/B] 14.5 inch barrel: [B]2589.4[/B] FPS avg. (Daniel Defense and BCM lightweight hammer forged chrome lined, carbine & mid-length gas system) 16 inch barrel: [B]2683.1[/B] FPS avg. (BCM C8 SFW heavy profile chrome lined barrel w/ Simon steel sleeve, carbine-length gas system) 18 inch barrel: [B]2687.5[/B] FPS avg. ([URL='http://www.rainierarms.com/rainier-arms-select-5-56mm-medcon-barrel-18']Rainier Arms Select Medcon stainless polygonal rifling[/URL], mid-length gas system) 18 inch barrel: [B]2712.5[/B] FPS avg. (BCM Mk12 SPR heavy profile stainless steel, rifle-length gas system): Now, thinking about your question; perhaps 18" inch barrel might be the magic sweet spot for your project. Good luck. [/QUOTE]
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