My few pennies worth.
Been shooting for all my adult life, on average exposed to at least a couple of 1000 shots a week.
Started out with the 3M like these
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-E-A-R-Classic-Earplugs-310-1001-Uncorded-Pillow-Pack-2000-Pair-Case/?N=5002385+8709322+8711405+8720539+3294780198&preselect=8711720&rt=rud , used them for all sorts of gunning (5,56 to large caliber). Worked fine, but a PITA to wear all day, especially when the need to communicate is present, or the need to use your ears to listen to surroundings.
Then the state figured out it was a good idea we could communicate and listen to our surroundings, and they went with the molded type with passive filter (shot killer). They were ok to wear all day, and we needed a new mold made every 3 years (health and safety again, your ear canal changes with age and weight difference too). After we had them as issued for 10 years or so, then the light bulb went on, they were actually not protecting good enough for gunshots ( especially long bursts of 7,62 and the report of 12,7 mm). They are simply just not good enough protection (actually when you look up on the companies webpages what the NRR is, they rarely are above 29). By the way, we used Phonak ones. Can’t see what the NRR are for the CENS And if you go that way, do get the ridiculous colours, easier to find when you drop them in the field.
Now we use MSA Sordin with the gel cups, special made so they can hook up to our communication. Nice and comfy, and give a good situational awareness .
i’d use some sort of that, MSA,Peltor or whatever brand that comes recommended where you are with electronic enhancement, when out hunting.
For they clay ground, I’d recommend these
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-E-A-Rsoft-Yellow-Neons-Earplugs-312-1250-Uncorded-Poly-Bag-2000-Pair-Case/?N=5002385+8709322+8711405+8720539+3294780195&preselect=8711720&rt=rud , very comfy to wear for a long time ( remember to insert them correctly). They have a NRR of 33 dB, which is better than molded earplugs. Over those I’d have some normal ear defenders, with no electronics in them ( not allowed in my discipline). I have the peltor X5.
It has 2 big advantages on the clay ground, 1. I feel isolated, can only hear the report of the guns, and vaguely the horn, so I don’t focus on my, or others scores. 2. When I remove the over ear, I’m still protected. I have tinnitus due to being under the muzzle of a 12,7 machine gun emptying a box of ammunition. And due to being a tough smart ass in younger years listening to load music on my Walkman, and also the occasional chat needed at the shooting range (thus removing over ear defenders).
You can shoot every day for 9 years using the foam ones, before the CENS are a better buy (just financially, still don’t know if they protect better, as mentioned I can’t find NRR). Sure this will rub some folks the wrong way, now that they have paid through the nose, for something that might give them less protection ( only talking clay shooting here, not hunting).
Lars