,223 Velocity?

DoubleCK

DoubleCK

New member
Hornady advertises the muzzle velocity of their .223 Remington, 55 grain V-Max load at 3240 fps. I suspect that that figure is out of a 24 inch barrel.

I am shooting them out of my 18" R-15.

What do you think the actual muzzle velocity is?
 
When I chrono my handloads they are slower than what the manual sez they shoud be. I have also chronoed factory loads and they tend to be slower than published. My 223 loads are out of a 20" AR, with my best groups at 3120fps with 55gr. V-Max's. I think most published loads are out of 24" or 26" test barrels inside a factory test tunnel.
 
Originally Posted By: RiflemannWhen I chrono my handloads they are slower than what the manual sez they shoud be. I have also chronoed factory loads and they tend to be slower than published. My 223 loads are out of a 20" AR, with my best groups at 3120fps with 55gr. V-Max's. I think most published loads are out of 24" or 26" test barrels inside a factory test tunnel.

Ten Roger. You gotta best guess for me?
 
Hey DoubleCK check out this article wrote by Chuck Hawks it might help you see why your question though a good one is hard to answer... velocity loss per inch...
forgot to tell you the part about velocity is at the bottom of the page...

David
 
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I have found Hornady ammo to be very close on published velocity. But your right it's normally a 24 inch barrel so if I had to guess I would say 3050-3100fps so if your just plugging a number into a ballistic calculator I would try 3075fps and call it close enough for government work.
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Velocity loss can be very low or very high. I have 2 300 win mags one with a 24" one with a 20". A 220gr load I use is 2750fps in the 24" and 2695fps in the 20" I have 2 243 one with a 22" and one with a 18 1/2" A 75gr Vmax load I shoot is 3000fps in the 18.5 and 3200fps in the 22". An 85gr load I shoot is 3175fps in the 22" and 3075fps in the 18.5". Most 55gr loads out of my 18.5" mini14 223 are right near 2950fps to 3050fps. I have shot several 55gr loads and 3-4 different bullets over the crongraph.
 
My 40 grain Ballistic Tips range from 3750 to a little over 3800 in my 26" tubes, and the same load in an 18" X-P 100 is right at 3500.

There's no hard and fast rules on velocity loss per inch, only generalities......
 
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