1.751 is fine. You could probably get away with 1.755. If your close to 1.760, trim. Personally, I trim anytime its over 1.755. Anything under I don't bother to trim.
By the way I use only winchester or LC brass for accurate and high quality reloaded rounds. I use whatever I can get...WCC, PPU, Rem R&P (dont know what that is) for plinking.