In the 308 vs 7x57 debate I’ll agree with MD and say the difference on game is negligible and that can be expanded to a whole bunch of other medium capacity rounds that throw 140- 180 gr projectiles from .26 cal to 32 caliber. Though I currently own a 7x57 and have owned if I recall 3 others and like the cartridgefine I too would go with a 308 if starting from scratch. Why well stipulating performance is similar I have found that the 7x57 usually takes some load tweaking to get them to shoot acceptably. The 308 however is usually a pretty decent shooter out of the box with a variety of loads bothfactory and hand loaded. So cheaper ammo off the shelf, larger selection, less finicky, comparable recoil and performance. What’s not to like?