Beginner here need advice on glass

[Cthulhu]

Do you guys think it is safe to buy a used scope?

- I'd say its a lot like buying anything used. Research the buyers feedback.

Most have a transferable warranty correct? That video helped I've always used sfp and just held over I like how I can use math with moa and ffp to put me right on target. Also do most of these scopes help you estimate range?

- Not sure about the warranty. A good manufacture will take care of you and back up their product unless its been very abused. Glad the video helped.

- You can use either FFP or SFP to Mil/MOA distance. The trick with SFP is you need to use the correct magnification to get an accurate range estimation.

Here's a better explanation of SFP ranging.