Yeah I got the same issue on scope use but.. The scopes do use "picture in picture" mode so then it is normal for the fps to tank in fact, just... Wish we could have an option what type of scope to use. Whole screen zoom in, which wouldn't cause lag but would definitely not...
I have Re-installed my GPU drivers, turned off all the overclocking i have done, even tried turning off HDR to no avail, also re-installed the game to see if that could help with something. Anyone got any tips of answers on how to make any other maps playable, i do...