Skeeter, I checked my notes and this is what I had found.

At 200 yards the 22 caliber holes were somewhat able to see at 15x and at 300 yards I was barley able to make out the holes for the 338 caliber with the 45x.

If you plan on using this spotting scope for distances up to 300 yards at the range , I would suggest to get something with higher power then 45x but it would also depend on the type of spotting scope meaning better quality. Good luck.....