Lloyd - that bites. You have had the worst problems with Springfields, and now the Para. I could understand if your fingers aren't long enough to reach the trigger or you aren't tall enough to see over the sights but I sorta doubt this is the case.
Do you need a new barrel with a deeper chamber??? You said 'mixed handloads' - did you get the chance to throw some factory ball or mil-surp out the door?
I usually shoot handloads in all my fuerty-cincos but always have some ball factory/mil-spec around to make sure I have a proper chamber and a new gun functions on mil-spec ammo. Do the handloads you shoot need to have the boolets seated deeper?
If the chamber is of proper depth can you bevel or relieve the immediately presenting lands as you would bevel the forcing cone in a revolver???
Is there anything we can do to help??? Can you ship me that fawlty pistol and 40 lbs of handloads and let me wring it out fer ya??? I will clean it properly, just to show ya that I can take it all apart and even get it back together without any spare parts left over. Yor Fren, Mikey.