Amateur1985

Hi all. I do not know if this is the right place to ask such a question so if not, please accept my apologies. I have a 130/650 Newt. What would be the limiting magnitude of this scope under Bortle 7.25 (I know there is no such a thing but my skies are not 7 or 8 but somewhere in between closer to the 7, probably). I have checked some websites where you enter the specs of the instrument you have and they mention something like mag. 11. Somewhere here I have red a very good article about the limiting magnitude with a formula and according to it it gives again around 11. For my binos (SkyMaster 15x70) the limiting magnitude is around 8. However, it seems a lot to me. Can somebody share his/her experience? Thanks in advance.