You don't compensate for bullet drop by hold-over, you compensate by dialing in the right angle on your scope. Now, 60 feet of drop seems like a lot, but at 1600 yards that's about 40 MOA. Most better scopes will do that even if the scope is mounted parallel to the bore. Long-distance guns will typically help with large compensation angles by having an angled base, giving you a 20 MOA head start and a better use of the scope's adjustment range.
F 135 - the right choice