Excellent information about hearing protection, including a table of gunfire noise levels. http://www.e-a-r.com/hearingconservation/faq_main.cfm
Peak Sound Pressure Levels (SPLs)
Type of Gun SPL (dB)
.44 Revolver 170 dB
45 Automatic 165 dB
M-16 160 dB
.357 Revolver 160 dB
12 Gauge Shotgun 155 dB
.38 Revolver 150 dB
.22 Rifle 145 dB
Home Depot carries the red NRR 21 Stow Aways for $18. When they're not red they're sold to us as "Shotgunners" for a higher price. For $14 you can get the clunkier NRR 20 muffs.
Regardless of price, if the muff doesn't have an NRR with it you should not buy it.
Peak Sound Pressure Levels (SPLs)
Type of Gun SPL (dB)
.44 Revolver 170 dB
45 Automatic 165 dB
M-16 160 dB
.357 Revolver 160 dB
12 Gauge Shotgun 155 dB
.38 Revolver 150 dB
.22 Rifle 145 dB
Home Depot carries the red NRR 21 Stow Aways for $18. When they're not red they're sold to us as "Shotgunners" for a higher price. For $14 you can get the clunkier NRR 20 muffs.
Regardless of price, if the muff doesn't have an NRR with it you should not buy it.