Interesting what barrel length with do....
http://gunblast.com/NAA-Sidewinder.htm
In Jeff's Gunblast review there is no difference between the top .22 LR and top .22 Mag velocity....983fps....none.....
Oh well,
Byron
The firearm must be considered
Those little mini-poppers do not burn powder well with the itty bitty barrel and all. The powder in the 22 Mag doesn't get going until down the barrel quite a bit more.
The firearm must be considered
The 22 Mag. as I remember was intended for use in rifles. The use in hand guns came after. Just Saying. ATB
+1
.
Seems like I remember
by Bob Hatfield 
, Wednesday, January 16, 2013, 16:55 (4332 days ago) @ Byron
my 6-1/2 inch Single six chronographing 1500fps with the 40 grain JHP Winchesters or very close to it making it a viable alternative to the 1050 fps of a regular 40 grain 22 LR. But then again the longer barrel.