"...referencing shooting offhand as a part of their regular practice regimen. Anybody here that does it,..."
Yes. With my CC/SD/HD .38 SP and .357 revolvers.
Not so much with my .22LR custom RH grip target pistol. I have done it with the .22, and that big thumb support ridge HURTS digging into my left palm.
" why?..."
So I can if I ever need to.
Also, I am using the NRA Marksmanship Qualification Program as a personal curriculum for developing my shooting skill. The Basic Practical and Marksman levels only require a two hand strong hand course of fire. Beginning with the Marksman First Class level, there is a weak hand (the term NRA uses instead of off hand) stage course of fire required for each level. Marksman First Class and Sharpshooter require two hand firing, strong and weak hand. Expert and DIstniguished Expert both require one hand both strong and weak hand stages.
I am new to this, so I am still working on my Marksman First Class.
craig
p.s. Oops - I did not realize "offhand" has its own meaning. I thought (think) Black Adder was actually referring to weak hand. As I said, I'm still new.