I have littlr use for +P+ and +P.
My only uses for it are:
1. +P+ 38 special in a 357 magnum revolver. K frame guns are easier to control.
2. +P in K frame size 38 special revolvers.
Never use either in a semiautomatic. They are built for a specific pressure range. There are those that will tell you it's okay if you use a heavier recoil spring.
They know more than the engineers that designed the gun? The recoil spring has nothing to do containing pressure. These heavy loads will accelerate wear.
Once you have created an entrance and exit wound in the target there's nothing that extra velocity dies.
+P and +P+ do little, if anything to improve terminal ballistics.
It all depends on how many primers you need to get rid of. My favorite way to dispose of them is to fire them in the gun. Some dented cases can be resized enough (with primers in them and decapinng pin removed) that they can be chambered. Sometimes I would use a bench vise to hold the case and use a pin and a hammer to set the primer off. When I do that I wear heavy leather gloves, a full face shield and have a fan in the window working on exhaust.
It is generally not worth it for 2 reasons.
Pressing out a live primer carries a risk that it will ignite - got a great thing to be doing when you're standing right there and could damage your decapping tool.
Once it has been seated the anvil is compressed into the cup. Pressing it out and reseating it in another case may cause the anvil to shift and result in a failure when you try to fire it.