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  #1  
Old 12-18-2019, 11:34 PM
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Anyone have velocity data for 5.5" ? Will Sub cycle?



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For HV ammo, also anyone clocked Sub-Sonic?

Thanks.
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  #2  
Old 12-19-2019, 07:38 PM
skwerl58
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Can't help with velocity data but my Mark II cycles CCI sub with no problems
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  #3  
Old 12-19-2019, 07:56 PM
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http://ballisticsbytheinch.com/22.html
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Old 12-19-2019, 08:05 PM
skwerl58
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Great info in that chart
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  #5  
Old 12-19-2019, 09:53 PM
Speedo2
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I've chrono'd SK Magazine (40 gr RNL SV) at 885 FPS from a 5" Mk4; average of 40 shots. Also ran a few Lapua Pistol OSP (40 gr RNL, SV) at about the same (885 FPS), but with about 1/3 Std.Dev. of the SK. Both cycled the Mk4 fine. -S2
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Old 12-19-2019, 11:55 PM
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Thanks folks!
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Old 12-22-2019, 11:05 PM
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Quote:
Originally Posted by Speedo2 View Post
I've chrono'd SK Magazine (40 gr RNL SV) at 885 FPS from a 5" Mk4; average of 40 shots. Also ran a few Lapua Pistol OSP (40 gr RNL, SV) at about the same (885 FPS), but with about 1/3 Std.Dev. of the SK. Both cycled the Mk4 fine. -S2
Its been a minute when I did my chrono data, but Speedo2 is spot on with what I remember.

Standard Velocity stuff works well in all of my MKII's. The only round that IS unreliable is the CCI Quiet (Load #960 - 710fps) with a suppressor. It might cycle, it might not. I treat it as a single shot. The CCI Suppressor load (#957, 970 fps) cycles just fine in my 6 7/8" host.
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Old 12-27-2019, 10:37 PM
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Thanks

Thanks for the info
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  #9  
Old 12-28-2019, 01:08 AM
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I have run into two batches of CCI SV (paper box) that is weak and will not cycle my HS or MkII. First batch was several months ago. CCI had me send some in to them. They saw nothing wrong. I think I am stuck with about 2 cases of this crap.
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  #10  
Old 12-29-2019, 01:05 AM
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Good Lord man! Just get a lower power recoil spring and get on with your life. https://www.saronagunworks.com/store...=recoil+spring
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  #11  
Old 12-29-2019, 12:38 PM
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great data - thanks for posting it ,
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