The
.22" WMR cartridge is a
very useful wee round that will stretch out your hits on rabbits, hares & turkeys - if your eyes & optics are up to it ... if only the ammo was a bit cheaper to buy.
It was introduced by
Winchester in 1959 - but they didn't sell a gun in that chambering until 1960. -
S&W,
Ruger, and
Savage all beat
Winchester to the market there.
22"LR, .22"WMR, 5.7x28mm, 5.56x45MM (.223")
(We're all '22's together!)
That photo above shows that while the .223" really might sometimes be called a "mouse gun" having the same bore as the cheap as chips .22" Rim-fire .. its power is in a different class altogether. - Just look at the case sizes.
-The .22
WMR at
369ft.lb. with a 40gr pill is also in a much higher class than the "two-two" - giving more than
three times the energy of the
104 ft.lb. Long Rifle. ( The NATO 5.56 x 45 mm (
.223") gives
hugely more at 1,325 ft.lb.)
The
22" Mag (
WMR) is obviously a bigger rim-fire case than the .22" long rifle RF - being longer and slightly fatter - but it is also made using thicker stronger brass to safely operate at higher pressures. The
22 Mag can send its bullets off at over 2,000 feet per second
from a full length rifle barrel and around 1,500 fps from a typical handgun. - So it's "flatter shooting" and harder hitting.
Optimum barrel length for
highest velocity in
22 Magnum, .22"
WMR is around
18 to 19 inches
- Optimum barrel length for .22" R/F
Long Rifle is variously quoted as 14 to 16 inches.
- So what's your guess about the muzzle velocity from a
1.25" revolver barrel having a cylinder gap?
Standard Manufacturing S333 THUNDERSTRUCK .22" MAGNUM Revolver.
- EIGHT CHAMBERS - FOUR Shots - 1.25" Barrel:
I really do like this
concept of the twin barrel - two-hammer self-defence carry gun using a two finger trigger press. This design
could enable folk living with hand injuries / amputations or arthritis to be able to shoot effectively. - BUT consider this .. That trigger pull is around 23 pounds and really needs the two fingers to achieve it's l.o.n.g mushy stretch.
And - reflect on just
WHY the wee
Thunderstruck two barrel handgun is so called .. surely the roar of two
WMR cartridges discharging together from the stubby
11/4 inch barrels will assault your unprotected ears with an almost physical blow .. I'd guess that the
WMR caliber choice was for marketing reasons ..
"TWO MAGNUM ROUNDS FOR EACH PULL OF THE TRIGGER"
And to what purpose? .. Those "Magnum" bullets will be lucky to make anything like
800 ft/sec before they exit those stunted tubes ..
no faster than the quieter
Long Rifle rounds would manage.
Note: We are considering only
velocity here - Shorter barrels will in general give a
louder report as
the gasses will exit at higher pressure.. High velocity gasses may overtake the bullet
leaving the muzzle and slightly unbalance the projectile's path causing a loss of accuracy - this is another good argument for adding a silencer or 'sound moderator' to your guns - as these work by reducing the gases escape velocity and pressure.
NAA 5 Shot Dual-Caliber Revolver.
4 Inch Barrel Should Work OK:
You really mustn't think that you can safely use
RF in
WMR chambers despite the smaller 'Long Rifle' .22" going into the
WMR chambers (
It does not fit). If such double use is wanted you can buy some brands of convertible revolver with swappable cylinders.
This interchange seems to work OK despite the difference in bullet diameter: The
22 WMR bullet is .224 of an inch and the
.22 Rim-fire is .223" diameter - so the bullet fit in the rifled bore might be somewhat compromised. - "J" rightly reckons that the mismatched rate of spin in the rifling would be worse than the slight bore
diameter difference.
22 Long Rifle with 22WMR Ball, Hollow Point, and Polymer Tipped 'varmint' round.
The
.22" WMR is a very useful medium range 'Varmint' and small game rifle cartridge available with various design projectiles weighing 30, 40, and 50grains. Excellent here for stretching the distance you can expect to hit rabbits effectively - but the ammunition while cheaper than centre-fire is still much dearer than .22 long rifle R/F - and can't be reloaded.
In America the
22" WMR is held by some to be quite a useful self defence calibre for very compact (sub-compact) handguns and
'Derringers' .. rather than the .22" Long Rifle R/F - but there really isn't much difference in velocity between the two rounds out of a two or three inch barrel (but the
22WMR will be impressively much
LOUDER!)
We live in an era where PERCEPTION has become reality ..
"It sounds much louder/more powerful".
RUGER Single Six Convertible Revolver Has A 9 1/2 Inch Barrel ..
And Is Beautifully Made - Quality Can STILL Be Found:
If you enjoy technical questions about ballistics and barrel lengths - The place to start has to be the Web-Site "
Ballistics By The Inch" - BBTI - they have measured the velocities of the common calibres 'inch-by-inch' and put it all up on-line in table form. - Brilliant. - They've even had a look at the polygonal rifling versus 'land & groove' performance.
http://ballisticsbytheinch.com/22mag.html
The
Keltec PMR 30 s/a
22 Magnum pistol claims to have been around USA since 2010 - and uses a 4.3 inch - 109 mm barrel to release it's load of thirty rounds from quad-stacked magazines. My guess is that it will still be
LOUD .. but a fellow club member is tussling with our irrational licensing regime - who currently are denying him entry and Customs release of the first ever specimen to land here on permit.
The
PMR 30 would be useful for knocking down steel silhouette chickens at extended range - if they ever stop being so objectionable.
Marty K
- This post is an 'updated' version of my earlier .22 Magnum post:
https://flicense.blogspot.com/2014/04/22-wmr-rimfire-magnum-useful.html
M.K.
.. I've signed-up to Patreon. - after five years writing now you can send me a wee support - starting from $1 - for all this stuff from exotic New Zealand .. yes most everything here is indeed EXOTIC .. apart from those interesting native birds eh.
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