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I have two semi-autos that shoot 5.56/.223. One is 1:7, 16 inch barrel and the other is 1:10, 21 inch barrel. 55 grain for the 1:10 and 62 grain and above for the 1:7.
62 grain works OK on the 1:10, but 55 grain is more accurate.
I have my ammo to gun ratio perfect. More 62 and above grain for my go-to SHTF gun and plenty of 55 grain for my plinking gun.
I have noticed in the graphs and charts that you will find on the internet, they never use the length of the barrel in their calculations. A 16 inch barrel is much different than a 20" barrel with the same twist.
62 grain works OK on the 1:10, but 55 grain is more accurate.
I have my ammo to gun ratio perfect. More 62 and above grain for my go-to SHTF gun and plenty of 55 grain for my plinking gun.
I have noticed in the graphs and charts that you will find on the internet, they never use the length of the barrel in their calculations. A 16 inch barrel is much different than a 20" barrel with the same twist.
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