a quandary that I went through just few months ago for my PSA. I had a Romeo 5 at first. it was ok but it was too small..I had a IIRC Vortex "Scout Scope" but the eye relief was too much so I sold it to Jawesome. It is all about the eye relief!
What I ended up doing was putting this mount sitting backwards (towards you) but the base all the way to the point the receiver meets the barrel, then I put a Redfield 2x7x32. It works for me.
Monstrum Slim Profile Series Offset Cantilever Picatinny Scope Mount | 1 inch Diameter..bout $29 on Amazon
now I will tell you that afterword my "pistol" was not as accurate at distance has hoped. The target acquisition/identification went way up which is important to me