223 Rem. Ammo

[xjon]

Morning Fellas, so instead of jumping in and buying any old stuff. I have been doing research on what grain bullets would be be best for my equipment. looking at twist rate vs bullet gr.
here is an article I found on the 5.56 (223) vs barrel length and twist. so I am digging in the science of accurate target practice. I have 2 semi autos with twist rates of 1-9 & 1-10 based on those twist rates recommended bullet grains is 55-75 gr & 55-62.
interesting to understand that for heavier bullets the higher twist rate is required.

if that is the correct lingo to state. o yes these are short barrels (the author states in his article)
http://www.gunsandammo.com/ammo/pair-barrel-twist-rates-ammo/

So I have a 1:7 twist 18" and it can shoot 55gr factory fmj, 77gr norma match factory, 40gr reload (lead free boat tail) 1-1.5" groups. However 62gr CBC Magtech fmj's will shoot 3-4" group. Go figure.

Unfortunately for reloading, you have to try out different weights, style, etc. to see what your rifle can shoot best. Eventually you drive yourself crazy...

 

[Bowman]

"quote Unfortunately for reloading, you have to try out different weights, style, etc. to see what your rifle can shoot best. Eventually you drive yourself crazy...unquote "

seriously I can see why... at least finally I am studying the science of it..
learning the different types and geometry of the bullets..
I know I am scratching the surface.. I am going to save for that quality rifle.
but I only really doing it for fun & improving my shooting skills.

 

[Bowman]

an other good article good reading
why we need a fast twist rate
https://ronspomeroutdoors.com/blog/choose-right-rifling-twist/

 

[Bowman]

View attachment 33642
Barnes ive used. Blackhills im trying out.
As always buys a few boxes and test which one your rifle likes. As long as it groups, ill use it. Whether 1" or 5". Depending on grouping size determines target range.


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so far your recommendation is the best option..