I just published a new blog article on how to put together a very effective long range spotting scope for less than $250. This is the setup I use at 1000 yard ranges. Enjoy!
https://www.jamerllc.com/jamer-in-action/build-your-own-killer-spotting-scope
https://www.jamerllc.com/jamer-in-action/build-your-own-killer-spotting-scope
