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Moderator question.

  • 12-05-2023 10:28am
    Registered Users Posts: 17

    Morning folks.

    I have been using the RCC m48 moderator for some time and found it very good

    Recently I bought a new Rifle with a 17x1 thread and I had to change my mod. I was limited to what I could buy because of the thread type. So I took a home a 17x1 blaser mod .30 cal. Its a lovely mod but it's louder than my old rcc.

    Does the bore diameter make the difference? If I got the same mod in a 6.2mm or 6.5mm would it be quieter. I got the 30 cal because of availability issues.


  • Registered Users Posts: 14,945 ✭✭✭✭Grizzly 45

    Im guessing for m your post you are using something in a 6mm cal?

    If that is the case,yes it will be louder if you are using a 30 cal can, simply because of bore dia, as the gas has more "room" to escape out the bigger bore in the can behind the bullet as it travels thru.

    "If you want to keep someone away from your house, Just fire the shotgun through the door."

    Vice President [and former lawyer] Joe Biden Field& Stream Magazine interview Feb 2013 "

  • Registered Users Posts: 7,020 ✭✭✭clivej

    I always use the 30 call mod on both my 308 and 223.

  • Registered Users Posts: 17 markhunter10

    Yea I'm using a .243.

    I noticed the 30 cal can has a much louder crack than the old moderator that was specifically for the .243

  • Registered Users Posts: 6,596 ✭✭✭Feisar

    Here's something I came across when researching the topic:

    "Radial Clearance (bore size compared to calibre) was the single most significant factor impacting sound attenuation – the same moderator with a lower radial clearance out-performed the larger bore model by over 6dB reduction"

    First they came for the socialists...

  • Registered Users Posts: 38,979 ✭✭✭✭Mellor

    A .243 specific mod will out perform a 8mm mod whacked on the end. can you exchange?

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  • Registered Users Posts: 17 markhunter10

    I hope so! Was very expensive