Hello, Im looking at buying a new Ruger M77 Target grey rifle, 26 inch heavy barrell. In either 243, 25-06 or the 308 winchester. I use to do alot of hunting a few years back with a Weatherby in 30-06 caliber. I have decided to get back into the sport after 15 years. I plan to do some long range pest control out to maybe 300- 500 yards and also use it on pigs and goats up in the mountains, As I only want one rifle I am trying to decide on what caliber to purchase... I am leaning towards the 25-06 using 100gr Nosler projectiles in SPBT, I have purchased a Bushnell 6-18 X 50 scope to go with the Ruger rifle. Any comments on what caliber to choose would be greatly helpful, Thanks Jamie, Australia.