I prefer the 7mm over the 243/6mm. Just started loading 100gr. HP in my custom 7mm Rem Mag, and they group really well, around .75" at 100yd. Hopefully, I can shrink them even further, but for now this will handle coyotes out to 400yd pretty easily. I have a 243 and have found that the 7mm seems to buck the wind better out here on the prairies of South Dakota.