I have not used Becks yet but I have some of their ammo ready to try. I've got their .308 subsonic and .223 lead-free Controlled Chaos rounds which look pretty amazing.
Beck's subsonic .308 is what I call a "rainbow round" . At 200 yds, the sub round drops as much as a supersonic round drops at 700 yds.
Inside 100, no sweat... I'd just make sure you're zeroed and only hunting with the subs. If you mix em up with supers, you'll potentially miss based on the spot you're aiming for on the hog.
I know this because I have been testing them for similar escapades.
Just like a subsonic 300AAC 100 yd zero, also Zeros you at 300 yards with supers ( or damn close to it).
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