mmb617,
Sorry for getting into this discussion late.
Back when I shot iron sight 30 cal NM, I used a Kowa TS601 spotting scope with a 25X eye piece. At 200 yards, I could actually see the.30 bullet holes. At 300 yards and beyond, I needed the assistance of either golf "tees" or spotting discs. When I graduated to my AR HBAR, even with the 25X eye piece, I couldn't see my bullet holes at 200 yards with my spotting scope unless it was open blue sky behind the target, like you see at Camp Perry.
Now that I'm disabled and shooting F class, I retired my spotting scope, and using my rifle scope to read mirage and (when not using electronic scoring) view the scoring discs. On my 600 yard AR, I use an old El Paso Weaver T10. My Rem 700 in 308 wears a Weaver T16. My Rem 700 Long Range (1000 yard rifle) wears a Vortex Viper PST. My 224 Valkyrie upper will wear another Weaver T10 when it hits the 600 and 1000 yard lines. While magnification can be your friend, it can also be a greater enemy!
The likelihood of being able to view a quarter inch bullet hole or smaller at 200 yards or more will typically require a spotting scope with an eye piece of at least 60X, if not more.
Good luck in your quest!