I do not recommend overloading in any firearm. +p loads can be dangerous in any firearms. That being said.....
I have raging bulls in .44 mag and .454 casull. I have gone 20-30% above max with both of them. I am not going to tell you what powders and how much because I dont want anybody blowing themselves up, these are loads I worked up in my guns.
What you need a +p load for in deer country is beyond me. I live in Alaska, and any .44mag load, and any modern firearm .45lc load is plenty for a sidearm.
Anywho... I have had brass stick so hard I had to slam the ejector to get the brass out, and my RB's were still fine. They are built like tanks and will handle hot loads.
Read the first part again though.