From: Jonathan Spencer, [EMAIL PROTECTED]
>I recently purchased a sound moderator for my 10/22 for vermin control.
>Problem is that the noise is cut down, but not exactly unnoticeable.
>There is still a distinctive 'crack' upon firing.
Then I suspect your ammo is supersonic. Here are some figures for ammo
I've tested over a chrono from a Sako Finnfire bolt action rifle. Also,
the blow-back design of the 10/22 produces more noise than a closed
breech rifle.
ammo velocity bullet type KE
==== ======== ====== ==== ==
Eley Short Pistol Match
691.8 36.0 conical 38.46
Eley Short Solid
929 30.3 LRN 58.37
Federal Short Hi-Power HV
1062.4 28.5 jacket LRN 71.8
Eley Long Rifle Pistol Extra
1058.8 39.5 LRN 98.84
Eley Long Rifle Extra HP
980.2 37.5 HP LRN 80.42
Eley Long Rifle Target Rifle
1038.8 40.3 LRN 97.07
Winchester Long Rifle Laser HV
1404.2 37.5 jacketed HP LRN 165.05
Winchester Long Rifle T22
1072.2 40.0 LRN 102.64
Federal Long Rifle Lightning HV
1215.8 39.2 LRN 129.34
CCI Long Rifle Stinger
1585.2 31.1 jacketed HP LRN 174.44
>Does anyone out there know what the bore
>size through the baffles should be for .22" as I feel I may have been
>sold the wrong calibre.
The front end of the PH moderator is a .30 calibre hole. This is to
allow for slight alignment errors wrt the rifle's bore I suspect. These
moderators do not use 'wipes' but baffles.
--Jonathan Spencer, firearms examiner
"Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves."
William Pitt, Earl of Chatham, speech 19 Nov 1783
"Where laws ends, tyranny begins."
William Pitt, Earl of Chatham, speech 9 Jan 1770
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