I also have a 20" barrel with 1:9 twist on my .223. Like Tacoma, I also use Hornady V-Max and H335. I load 24.5 gr H335 with Lake City brass and Rem 7.5 primers. I get around 3040 fps. I use 24.7 gr. if I load with Winchester brass. I primarily hunt coyotes. They are excellent within 200 meters, but much beyond that I do not trust them. I get about 3.5-4 inches of drop at 200 meters and a little bit of drift. By 300 meters, it is about a 14 inch drop - too much for me to trust.
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