I don't own one yet but a lot of people have sung the praises of the .280 Ackley Improved to me lately.
The case is formed by shooting .280 Remingtons in the improved chamber.
The recoil is less than the 7mm mag but gives similar ballistics.
Accurate when chambered correctly with enough punch to kill deer quickly at 1000 yds.
When I build my first custom rifle
this is what its going to shoot.
.308 winchester in a remington varmint weight or savage in varmint weight.
Buy the best optics you can reasonably afford.