I have had good luck with the Peltor TEP-100 electronic ear plugs. They have several tip options. The highest NRR rating is for the "Skull Screw" foam tips at 30 NRR. These tips are somewhat large and sometimes cause me some discomfort after a while, so I switch to disposable foam safety plugs for a while (30 to 32 NRR).
The TEP-100 can also use the "Triple-C Communication" ear tips rated at 27 NRR. These fit me much better with zero discomfort, fits really nice. However I find that the sound tube is a smaller diameter and it sometimes closes when inserted, blocking electronic sound coming through. So I usually switch back to the Skull Screws.
The foam tips have a higher NRR rating than the silicone flange tips, although those are comfortable and come in three sizes that come with the original kit so that you can experiment with what fits you.
I bought the Peltor TEP-100 set and extra replacement ear tips from a CGN site sponsor: SRS Tactical.
https://srstactical.ca/peltor-tep-100-tactical-electronic-earplugs.html
SRS Tactical have provided great service! One of the ear pieces had a defective switch on it. I returned it to SRS under the one-year warranty and received a free replacement right away. The plugs have functioned well for several years now. They hold a charge well, I have never had them expire when at the range.
For centerfire I always double up with ear muffs and plugs. I use the Peltor Sport Tactical 500 electronic muffs while wearing the electronic ear plugs. The audio works well, there is no interference between the two electronic systems. When I switch to passive foam earplugs, I adjust the ear muff volume as high as it will go, and can hear fairly well the conversation and RO commands.
I also get the muffs banging the stock sometimes during cheek weld. But I adjust the cheek weld and make it work. I suspect sometimes that the ear muff seal is broken with the stock slightly moving the muff off alignment. That is another reason why I always double up with the plugs.
For me, I find any ear muff, passive or electronic, is not enough protection for centerfire, so high protection ear plugs for me are essential.