The 25-06 shines on Antelopee's,it's a classic.I have killed goats with everything from 85 gr bullets to 122 gr.
I realy like the 115 gr to 117 gr bullet for the 25-06 here in Montana it can buck the wind fairly well(wich in Montana a 40 mph wind is a breeze

).I can sight in my Ruger #1 or my M77 2 1/2 high at a 100 and it put me just about dead on at 300,with a top of the back hold out to 425.The farthest I ever killed a goat was 489 paces(about 450-460 yds I geuss).
I shot one 2 years ago witha 300 wsm that I don't know how far but there was 6 telephone poles between me and him so that roughly 600 yds.Thats how I gauged my yardage anyways and it worked hit him low in the chest and piled him right on the spot.
You picked a good caliber for you Montana hunt have fun and maybe I will see you out there.


BBJ