Sounds like you're trying to do it right. Plugs and muffs. I really like the HLIS muffs. Work great and they're cheap.
But... those surefire plugs suck donkey balls. They don't offer much protection in the open or closed position, and subjectively, I don't find them to fit well or be comfortable.
Get some foam ones for cheap for best protection and crank up your e-muffs.
Even better, get some safariland plugs that are passive/mechanical and scale up to wear under your muffs as to hear better, at the sacrifice of some protection.
I wear those safariland plugs for work and shooting up to braked or magnum rifles. They don't do enough for braked high power rifles on their own. I just put the muffs on over top for that, and/or shooting indoors.
Guns are loud and if you don't already have some hearing damage, you may still get ringing because the like 160db directed at your ears from the brake/comp is not being neutered enough by plugs and muffs alone. Bar math says 160-22-32=106, 106>85. 85db is max hearing safe. 140db is impact noise single instance safe. You really have to wear plugs+muffs and use a silencer to be hearing safe. Most of us just use two and are comfortable because we're going deaf already and can't tell the difference. Your choice, I, and many others in this thread, have now told you the facts.
I'm half deaf already (and I'm under 30) thanks to Uncle Sam, some stupid things I've done, and gun hunting. Any more, a typical AR with 16"+ barrel and A2 flash hider isn't very loud to me, nor are shotguns, pistols just make my ears ring for a few seconds. The majority of my hearing loss is uncle Sam's fault, but I take responsibility for it getting worse after that. Don't be like me, wear your plugs and muffs. Even though shooting without hearing protection is only a small fraction of my hearing loss.