I don't know what to tell you. But I've tried a few pairs ($40 and $150) and ended up not using them. They work to block the loud sounds fine, but they 'shut off' on the loud noise and even if they take only a 1/2-second or less to turn back 'on' for normal conversations, albeit amplified ... I found I was losing half of what was said. 

Even more so when other close arms were going off. I just couldn't get used to them ... they became a source of distraction to me.

After a single round from a braked .308 Win two firing points to my right started my left ear ringing with permanent tinnitus in 2009, I don't go to the range without my electronic muffs. Never again will I "slip" one ear loose to hear what someone is saying.

I have used the Peltor Tactical 6S muffs for several years, and my only complaint is they wear out and quit working after a year or two (don't mean the batteries... those'll go dead in a day if you leave 'em on in your car.. which I keep doing...).   
The "recovery time" after a shot is MUCH faster than the 'el cheapo Midway brand electronic muffs I started with.. those were damn annoying!

I just got a pair of Peltor 3M TacticalPro muffs for christmas, and like them better. They're not as small a form-factor, so haven't proved out how they're going to work in all shooting situations yet, but they're comfortable, the electronics are good (great amplification for range commands from mumble-mouthed range officers, and fast recovery after the "cut off").

I very often have a plug in my right ear even when using the electronic muffs... I want to keep the ABSOLUTE MAXIMUM hearing in my "good" ear now that my left has that constant "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee" in it.   

Peltor ALSO makes some other models that have built in radio's, or wired communication "ports" so that a shooter and spotter can communicate that way, while providing the maximum protection for your ears.  I don't know much about those models, as I don't have need for them at the moment.

I HIGHLY HIGHLY recommend electronic "muffs" because they minimize the amount of time shooters have to spend yelling at each other to hear, and the amount of time behind the line when people just won't wear hearing protection just for that reason; they can't hear conversation.

Paul F.

I use the EAR classic 33 foam, put them in before I get out of the car. Wear muffs over, double protection. Lifting my muff still protected by the foam plugs.Earplugstore is the place to buy, getem by the case.

Used once in the ear  they get recycled as open bolt indicators with a zip time wrapped around the foam

Fact of the matter is firing line is no place for conversation, some have not figured it out some never will.

Boats

The Howard Leight muffs over a set of Radians molded plugs are an ideal solution. I've been going this route for many years for matches since there is likely nothing worse than 25-30 6PPC's with 21" bbls under a tin roof firing simultaneously.

Can't wear ear muffs can't get my head down on the cheek piece. I bought some ear plugs with a neck band that they raved about over on 6MM BR. They don't fit inside the ear they cover the opening and I like them allot. Best I have found to date and I have tried just about all of them. There is an offset in the neck band that gets it away from the stock and they are extremely comfortable. Don't recall the decibel rating or the name. If any one has an interest PM me I will try to locate the 6MM BR review. 

JLouis

Here is the link to the article. I bought the QB2

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JLouis

I use Walker's Power Quads in the duck blind and at the range.  They work OK for me.  At the range I also use the foam ear plugs under the muffs and often cuss at whomever it was that first thought up the muzzle brake.