Re: Need Nightforce suggestion for a 338LM
Reticle/knob angular system should match (i.e. MOA/MOA knobs/reticle or MIL/MIL knobs/reticle)
Here's a video on FFP vs SFP.
Reticle should match your shooting preference. More detail/increments allow for more precise hold offs/overs, but do clutter up the FOV.
Illuminated reticle would be nice to have if you're going to be shooting in low light situations, or have a "finer" reticle that lacks the "point and shoot" contrast that a thicker style would offer.
A Lapua can generate significant recoil stress that some optics aren't up to the task for, so it should have a "bullet proof" reputation.
Conistency of the mechanical tracking function of the scope will be paramount (even over optic quality if you must choose between one or the other), as the distances involved to see the Lapua's potential will involve you dialing in the ballistic solution.
Determine your desired zero range, and then plug all environmental factors into ballistic software. Where the bullet slows to 1150-1200 fps, is a good place to call the maximum distance you can plan to shoot that rifle effectively. Determine how much total adjustment you'll need out of the optic to go from your desired zero to see that range.
The above will also ensure the cant on your base isn't too much (for a closer range zero) or is enough to achieve the supersonic range potential of your intended bullet.
You have to view the optic as equally important as any other component on the rifle. It's part of a LR system (that includes the shooter, ammunition, ballistic software, and rifle), that will be limited by it's weakest component. You should strive for that to be you during the rifle build spec process.
And then with practice, move that "weak link" to another part of the system (i.e. bipod, or your ammunition making skills, etc), improve on that part.....move the weak link to another part...and so on.
Be sure to have fun too!
Good luck, and be sure to post up what you finally decide on.