I use them and really like their performance. However for a 308 I don't think any mono is a good choice because they cannot be pushed fast enough for my liking. I prefer to push them close to or over 3000 fps and I have had fantastic results with multiple calibers in this speed range. However I have not had near the results when shooting 2700-2800 fps muzzle. Recovered one 180 E-Tip my brother shot a mule deer doe with pretty much head on around 200 yards out and the tip was just peeled back. Bullet did its job but did not have near enough expansion in my opinion. I believe this speed range applies to all monos for what I like out of a bullet. The RUM you could maybe even step up to a 180 but the 168 will be fantastic too.