Couldn't agree more with everyone, .223 with 55 gr vmax for me, hardly ever have one run. You very well may find that bigger isn't always better. I was running a 6.5 grendel with 95 gr ballistic tips last year. Seemed like 1 out of every 2 I shot would run a ways. What I came to learn was the heavier bullet was pinholing right through several of them. This year i switched back to .223 and have only had 1 coyote of 30 run which i believe was a poor shot on my part at 300 yds.