Re: Best molded ear piece that you
A lot of places offer custom plugs, like Ultimate Ears (
http://www.logitech.com/en-us/ue/custom-in-ear-monitors/devices/custom-ear-plugs). If you scroll down, you can see the filters they have for different reductions. The trip to the audiologist isn't cheap, so factor that in. (~$50-80 last I checked).
The moldable DIY stuff isn't as good. Trust me when I say that you should get a trained audiologist to do it. When I got mine done she went WAY further than I would have on my own, and safely. Haven't seen the EAR inc. procedure. The way it's done professionally, they give you a 2" bite block to hold in your teeth. The put in a cotton ball on a string to block the canal and fill the ear with medical grade silicon with good pressure.
Honestly, though, these are passive and they will not provide enough protection for your hearing. They attenuate about 25 db from all noise and that isn't enough. Some foam plugs actually claim higher isolation in the 29 - 32 db range with proper (deep) insertion.
I have a custom set of the in ear monitors from Ultimate Ears (also not cheap) they are not be enough for a .223. I'm going to start doubling up with electronic muffs over them. Just got a set from MSA that needs a trial on the range.
Hope that helps. Check the other running thread about "Electronic Muffs or Plugs" for some good insight from other members.