Hello gutterdoc,
Yes.
I began as a young adult after a day of excellent duck shooting, as well as duck missing, over decoys.
My ears rang for awhile after that.
From then on, for many years, I put paper into them.
I've used local vegetation as well, in a pinch but it is not very effective.
If you experiment a bit, you can use just enough paper that it will mediate the damage to the membrane ("eardrum") yet, still afford you enough reception to lesser sounds, so as to not make a hunting trip miserable.
Now, I use soft plastic ones that have a stub or "tail" to pull them out with, and their business end has flexible/soft plastic rings (like 3 or 4 Saturn Rings) that fit snugly into the ear canal, effectively blocking most sound all together.
They are sold with their own, thin plastic lanyard, which I fasten either to the back of my hat or to my collar button hole, so they are always there, impossible to misplace during a shade tree lunch break, etc.
With these, I always wear one in the ear closest to the muzzle (like BRICKBURN recommends).
That way, if a sudden shot is required, at least my ear that would've been damaged the worst, is then not damaged at all.
The ear facing sort of away from the muzzle-blast wave, is slightly shielded by my big ugly head.
Likewise, when preparing to stalk an animal that has been spotted in the distance or in a herd, I just pop the other plug into my other ear and am thereby fully covered.
When hunting grouse, rabbit, pheasant, doves, etc., I just wear them in both ears and after walking awhile, I get used to the annoying sound they make in my ears with each step.
I recommend "training" your ears with them though, by wearing them for a few minutes a day, until you can build up to wearing them all day.
If you're not used to them, they can make your ear canals slightly sore from the long hours with their snug fit.
Only an ADHD old curmudgeon like me could've written a whole boringass book about ear plugs, sorry.
Cheers,
Velo Dog