Centrefire Moderator Test and Review
- Thread starter Edinburgh Rifles
- Start date
Cut+Squirt
Well-Known Member
This amount of unbiased data must be an industry first. Some interesting reading here.
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An Taín Hunting Outfitter
Well-Known Member
I absolutely cannot believe you did all that work!!! An industry first which provides the shooter with unbiased data and a pricelist to go with it!!!!
You would shooting magazines to shame with all that data and I hope you picked up your PhD on the way out. What a passion you have for your work.
You would shooting magazines to shame with all that data and I hope you picked up your PhD on the way out. What a passion you have for your work.
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Which bit?
the graphs seem to be the right way up unless that are not presented properly on some devices
let me know and I will edit them
EMcC
Well-Known Member
They are the one's I would find easier to read if they were horizontal.
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To turn the images round, just download them onto your PC (right click & "save as") & click to open them (Windows Photo Viewer) - Then you can turn them by clicking on the curly arrows at the bottom of the screen. - When you open them subsequently, they will still be turned.
Ian
Ian
Any chance of adding an aesthetic rating column please?
K
K
The DPT double magnum moderator used on my .25-06 was fitted with a .22cal stainless baffle and 5 off, 6mm (.243cal) baffles.
Eds own F&D is also designated for a smaller cal (.270 in this case). Both moderators are therefore "out of spec for caliber".
The smaller the bore, or the closer the bore is to the bullet, the quieter the moderator will be.
No it was a fitment shortfall on my part rather than a suitability
I didnt have a 30 cal 14x1 version to use on the 308 tikka unfortunately
We ran a 1/2" 30cal rated F196 moderator on a .270 so the radial clearance was huge
The bullet is 7.04/.277 and the bore is 8.6mm - Sound attenuation as a result was only 21dB
Bore = 8.6mm
Calibre = 7.04mm
Clearance 0.78mm
Sound attenuation = 21.41 dB
Compare to the same moderator in .22 form on the 6mmBR
Bore = 6.5mm
Calibre = 6.17mm
Clearance = 0.165mm
Sound Attenuation 27.40
This level is higher than all the other mods in the "in spec" 30cal on a 30cal list.
given that 3dB is double the noice
thats a 6dB difference just changing the hole size
thanks for the explanation
Excellent work Ed and Miki - some real, unbiased data
I wonder how easy it will be to convince the manufacturers lawyers to allow them to make the hole smaller
Cheers
Bruce
I wonder how easy it will be to convince the manufacturers lawyers to allow them to make the hole smaller
Cheers
Bruce
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