I recently purchased a used stainless Taurus 85.

I called Taurus today and found out that it was manufactured in 1988.  I was also told not to run +p ammunition through it and that they did not rate them for +p until 1993.  I see that SAAMI shows the standard round at 17,000psi and the +p at 20,000psi (less than 18% increase in pressure).

I would like to carry it with +p rounds, but I don't want to damage my pistol.  How much more stress does the +p round place on the pistol vs. the regular round?  Is there really a concern that I may damage the pistol or hurt myself?  Or is Taurus just doing a CYA be telling me that?