Most my kills with light-weight bullets are inside 300 yds, beyond 300 yds they seem to lose their WOW factor on Pdog kills , not to mention if there is any wind present it's tough to get on target. I've shoot 36gr Barnes VG with excellent red-mist-factor out to 300, my rifle really likes 40gr NOS & Vmax out to 400; beyond that it's 69gr SMK to 600+ .