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PostPosted: Mon Aug 22, 2016 8:23 am 
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Joined: Fri Jul 01, 2016 7:47 am
Posts: 711
Location: Bradford
I'm suspecting one of my sub 500fps rifles is shooting a bit hot, but do not have a chronograph (yet) to test it.

So, I can say with certainty that out of any of my PAL .22's they will expand in a medium like water, and sub 500fps they do not. I would say they come out at 750\850 fps (advertised 950 with alloy no doubt) in the PAL's.

I now have one that "semi" expands them, so I am pretty confident it is over 500fps. That means I have to trigger lock it, etc etc etc.

My question is, does anyone know at what velocity they start to expand? 600fps? 700fps? Just want a guesstimate of where this particular rifle is at the moment.

I'm looking at chronographs now, don't want cheap but also don't want 100 features I'll never use.

Thank You.

_________________
When the 425-hp "street Hemi" version hit the street in 1965, it was akin to taking an M230 chain gun to an arcade shooting gallery
Peter


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PostPosted: Mon Aug 22, 2016 9:13 am 
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Joined: Tue Jan 29, 2013 6:54 pm
Posts: 2415
Location: Northeastern Ontario
It is impossible to judge the MV of an air rifle based on how much a pellet "semi" expands. At the same time it is hard to say what the MV of an air rifle is with a given pellet based on what a manufacturer might advertise. But you are no doubt right that it will be less with lead pellets than advertised.


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PostPosted: Mon Aug 22, 2016 9:35 am 
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Joined: Mon Aug 08, 2016 7:23 am
Posts: 2829
Location: Somewheres near the Atlantic
Penage Guy wrote:
It is impossible to judge the MV of an air rifle based on how much a pellet "semi" expands. At the same time it is hard to say what the MV of an air rifle is with a given pellet based on what a manufacturer might advertise. But you are no doubt right that it will be less with lead pellets than advertised.


This is true. Could been a softer cast of lead, or expansion hole was drilled deeper. Only true way is chrony it.


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