Originally Posted by tackb
ultimately you need to put the bullet in the vital zone at the disance you want to shoot.
+1 on that statement!
Not sure of what 130 gr bullet youre talking about by I use the speer 130 gr HP #2005 in almost all of my 30 cals including 308 and they perform great on game such as Spanish Goat, Wild Boar, Mouflon and feral Sheep, Axis Deer and Wild cattle when the chance arises. I know that Tahr are stoutly built and you would have to come to your own conclusion on what to use Just putting in my $.02
Ive also used it for Red Stag,Fallow and Rusa in Australia out of a 300 WBY. shots were pretty close maybe from 150 to almost 300 yds if I remember correctly.
Although I cant remember shooting anything at 500m with it, it did great on a big axis buck @ a bit over 400 yds.
Let us know what bullet you decide on and good luck on your hunt!!!