I'll share my small bit of experience, but I don't think it'll help much. I'll share anyway.
I went ahead and bought a set of the custom molded ones from a vendor at the National Matches at Camp Perry. You sit in a chair, he mixes up a thick liquid and pours it in to your ear and it molds to your ear cavity. IIRC, it cost about $45.
I just don't like them. The problem that I seem to have is no matter how I put them in or "burp" them, I seem to have a trapped-air kind of problem with them. It's like when you are sick and your ears are plugged. Or when you are on an airplane and descending. I don't know. Feels like my head is in a bubble.
More likely that it's my ears/head that seems incompatible. You should also get review from folks who like them. I just couldn't get comfortable with mine.
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Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.
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