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  #16  
Old 10-04-2011, 01:29 AM
rick/pa
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Quote:
Originally Posted by Aladdin View Post
The long and the short of CZ barrels

We used five CZ 452 .22 rifles with different barrel lengths and fired six rounds each of six different cartridge types. The chart below reflects the average velocity of the six rounds followed by the standard deviation of the six rounds.

The rifles were:
CZ 452 Ultra Lux with a 28.6" barrel
CZ 452 Special with a 24.8" barrel
CZ 452 American with a 22.5" barrel
CZ 452 FS with a 20.7" barrel
CZ 452 Classic with a 16.5" barrel (Fuzzy the Limey's old CMP Sporter rifle)

The cartridges were:
CB Longs = CB
RWS Subsonic Hollow Points = SSHP
Wolf Match Target = Standard Velocity or SV
American Eagle Solids = Lead High Velocity or LHV
CCI Mini Mag Solids = Plated High Velocity or PHV
CCI Stingers = Hyper Velocity or HypVel

-------CB------SSHP------SV-------LHV-----PHV----HypVel

28.6 652/53 968/16 1037/13 1206/16 1188/24 1660/50
24.8 676/34 997/20 1062/13 1219/22 1217/40 1660/47
22.5 653/65 998/08 1069/10 1229/22 1213/24 1708/31
20.7 701/44 957/39 1062/05 1224/14 1190/11 1661/26
16.5 685/22 949/27 1057/14 1205/17 1208/22 1666/39
The variable here is the barrel since no 2 barrels are the same. The only way for this test to be valid would be to start with the 28.5" barrel on the UL, check the velocity of all the ammo, then cut 2' off the barrel, shoot again and lop another 2" off the barrel. Repeat as needed. But don't use my UL, I like it just the way it is.

Last edited by rick/pa; 10-04-2011 at 01:30 AM. Reason: clarity
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  #17  
Old 10-04-2011, 09:19 AM
general p.

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Aladdin
Thank you for that info which certainly disputes what was read previously. Makes sense considering that 20-22 inches is somewhat a typical barrel length, and am sure there will be argument that length is typical . Nonetheless, it should help provide an answer to his question.
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  #18  
Old 10-04-2011, 11:44 AM
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Aladdin

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Quote:
Originally Posted by rick/pa View Post
The variable here is the barrel since no 2 barrels are the same. The only way for this test to be valid would be to start with the 28.5" barrel on the UL, check the velocity of all the ammo, then cut 2' off the barrel, shoot again and lop another 2" off the barrel. Repeat as needed. But don't use my UL, I like it just the way it is.
this is as close as we are likely to see. I don't think any one is going to cut there UL barrel. That would be cruel and unusual punishment. If they did it would only be a test of what that lot of ammo did with that barrel. Another barrel may not react the same. at least they were all CZ barrels.: Another thought how about shoot 10 of each barrel length and average the results.
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