Man, I'm having a heck of a time with my ear protection. I finally got got a good cheek weld on my McMillan with a stock pack. Only problem is now I can't use ear muffs and still get onto my stock.
I am using those rubber 3 rib jobs in my ears and they seem to cut the noise until I get my cheek weld on the stock before the shot. At that point, my ear that lays next to the stock seems to stretch out bigger and I can hear some sound.
When the shot breaks, I get a quick blast in my ear! When I pull my head off the stock, hearing protection is good again.
custom molded "in the ear" plugs, not expensive, and they FIT ! some mail order places have kits, but go to any rifle, trap or skeet range and ask around and you will find someone who does it for you. well worth it.