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Look at the NRR. The cheap electronics run about 21 dB, that is not enough unless you double plug and maybe not then.
Hearing protection and good electronics cost money. I have Peltors now, will likely get Pro Ears Magnums at 33 dB, $319 list price when I need replacements.
Those $300 Sordins are only 18 dB, which is leaving you almost wide open to muzzle blast.
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I have a few facts and a lot of opinions.
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