Im sold on 25.06 however i started looking around for ammo and its harder to find than i thought. So looking at 243 and it would do for a 300yrd shot. I have a 270 win. (love it) since our field is 800 by800 yrds(northern lower mich.) would i wish i stuck with 25 06?(it would be for my kid if he lets go of the 270)