Anyone who thinks that even one shot does not do them any damage doesn't understand the problem!
The cilia ( tiny hairs) in your inner ear are kinda like short pieces of springy wire. When the pressure of a sound wave moves them, the nerves in your inner ear pick up the motion & contact and relay that to the brain as "sound". After repeated hard impacts of loud noises, some cilia lose their springiness and stay laying down - just like the bristles in a wire brush. They interfere with each other, and many lay flat. That causes two things - lack of ability to hear at normal sensitivity, and constant static or tinnitis. The cilia do not repair themselves, but some people are a little luckier than others and have somewhat more resilient ears. But EVERY single shot that an ear hears is stressing the ear, it is cumulative and irreversible. I also know from experience. If it gets bad enough, you not only lose your ability to hear and enjoy normal sounds, you hear a constant high pitched whine like an old TV set or a mosquito in your ear, AND it can affect your balance in very unpleasant ways.
Not using hearing protection for "only one or two shots" now seems to me a lot like not using eye protection when arc welding a small part or two.
I now use the baffle plugs for nearly all my hunting, they are made by several manufacturers. The Browning ones work OK and are reasonably comfortable. The best are an old pair of "Sonic" hearing protectors, they have a nice soft brownish rubber coverings and a metal cylinder housing the insides. I use Browning electronic muffs when doing stationary stuff like shooting waterfowl. It is important to use muffs that have the microphone covered with foam or you will get too much wind noise. If possible try out electronic muffs in the store, there is a big difference in how much static the systems produce ( my Remington muffs are crap!)