Cabelas Trophy Bucks

This power-up will only appear when you kill an animal from a long distance away using a scoped weapon. The icon is a bullet with three lines coming out the back.

Since I used a run and gun technique through most of the game, I managed to not get this achievement on my first playthrough. Therefore, I'd make an effort on levels where you can hunt animals (usually deer) from long distance to use a scoped rifle and knock this one out early.

Often times you will have two power-ups show up on the bottom right of the screen. The bottom one will be the first one you use and the top one will disappear within 4 seconds if not used. If the laser bullet shows up on top, quickly hit A to use the bottom power-up, hit A again to cancel it, and then hit A again to use the laser bullet before it disappears.

I also believe that if you restart a level, it will not save anything so if you used this power-up, you will have to save and continue for it to count.

Also remember that LB shows you where targets are, so this is useful when trying to find animals way off in the distance.