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Rifles, Reloading, Optics, Equipment
Reloading
Reloading .223 for AR-15
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<blockquote data-quote="Lefty7mmstw" data-source="post: 918912" data-attributes="member: 48043"><p>As to bbl length in an ar, my 20" dpms is less than 100 fps faster than my dad's 16", often half that. The 16" bbl will also act slightly stiffer than a 20" at the same diameter, so your accuracy potential is actually higher. </p><p> </p><p>I'd ditch the 55's and go to a 75 with one of the 4895 powders or Tac. That'll give you a lot more on the receiving end too as the bc's are better with the 75's. Your trajectory will be similar to better. </p><p> </p><p>As to dies, fl dies will work with most ar's, but small base dies are probably a better way to go as they will size the case down to factory new dimensions if properly set up. Ar's don't have a heck of a lot of camming ability for oversized ammo, so getting the stuff small enough to chamber easily is important. I use a fl die with my dpms and it does well, but I don't let my pipe get very dirty either.</p><p>I'd think about the cci mill-spec primer in your ar also.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 918912, member: 48043"] As to bbl length in an ar, my 20" dpms is less than 100 fps faster than my dad's 16", often half that. The 16" bbl will also act slightly stiffer than a 20" at the same diameter, so your accuracy potential is actually higher. I'd ditch the 55's and go to a 75 with one of the 4895 powders or Tac. That'll give you a lot more on the receiving end too as the bc's are better with the 75's. Your trajectory will be similar to better. As to dies, fl dies will work with most ar's, but small base dies are probably a better way to go as they will size the case down to factory new dimensions if properly set up. Ar's don't have a heck of a lot of camming ability for oversized ammo, so getting the stuff small enough to chamber easily is important. I use a fl die with my dpms and it does well, but I don't let my pipe get very dirty either. I'd think about the cci mill-spec primer in your ar also. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Reloading .223 for AR-15
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