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Old August 5, 2000, 09:50 PM   #1
Andrew Bornman
Join Date: July 3, 2000
Location: Goshen, IN, USA
Posts: 97
I realize that this is not reloading per se but this forum likely has the highest number of people with chonographs.

I would like to know the velocities of 40 grain .22lr both standard and high vel.

Please give me as much detail as you have. I am trying to work out the relationship between the mass of a slide or bolt and the mass and velocity of the a bullet.

If anyone could measure velocity from an AR-7 or Marlin model 60 I would be very grateful. Please provide details.

Thanks in advance.
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Old August 6, 2000, 10:17 PM   #2
Big Bunny
Senior Member
Join Date: August 9, 1999
Location: New South Wales - Australia
Posts: 605
I have done some chrono work on 22LR for target use and types of ammo before buying. The better the ammo ($$) the more consistent it was in fit and velocity etc.

Sub-sonic goes from 870-980 FPS.(Winchester)
'Super-sonic' 1150-1370FPS depending upon brand.

You will never get consistant velocities from 22LRs and length of barrel, chamber fit, ambient temperature, and height ASL is all critical.

As the AR7 is a 14" barrel you may get higher velocities than expected from this. Autos would lose far less than the popular conception Vs bolt rifles.

Have fun on your project.

If we shooting sportspersons don't hang together... we will all hang separately !
Never knock another's different shooting interest or discipline...REMEMBER we are all but leaves on the same tree of freedom.
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