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PostPosted: Wed Jun 07, 2017 10:52 pm 
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Location: Coalmont BC
Seems like you are confusing oz. (the way CO2 tanks are measured, which is the WEIGHT of CO2 they hold).... and CI (the internal volume of HPA tanks, which is the volume of water they would hold in cubic inches).... There are 16.4 cc's in one cubic inch (CI)....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Fri Jun 09, 2017 8:17 am 
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Location: Western NV
Thanks Bob

Yes, I get very confused on this type of stuff,
and when it is in metric measurements, it all goes out the window......... :?

Is tanks and cylinders the same, as I have seen then referred as the same?

What is the proper way to refer to each, ie?,
88/90 grams of co2 in a cyl is = to the weight of co2 or volume size?

Tia,
Don

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"Speeds fine, but accuracy is final"

QB-79, 22 cal
Airforce Condor 22 cal - pending


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PostPosted: Fri Jun 09, 2017 10:01 am 
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Grams are a unit of weight, as are ounces.... Volume is measured in cubic centimeters or cubic inches....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Sat Jun 10, 2017 4:54 pm 
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Joined: Fri May 05, 2017 11:41 pm
Posts: 48
Location: Western NV
Thanks Bob

I am going to make up a cheat sheet for this stuff etc.

Questions for you or anyone else that knows,

When using Co2,
Can you get liquid Co2 inside the AR, from the 88/90 gram bottles,
if you shoot at a high angle, 45* or higher, ie, starlings/HS sitting in 50-75' high trees?

My blind is set up between 15-20 yds from several trees, they set in just before they,
they drop down to the water guzzler (ground level), I have set up for the good birds to water from.

Or should I contain my shots to more level shots?

Will this liquid Co2 cause any damage to the AR or me?
I am not worried about HPA etc.

Can you "Dry Fire" the QB rifle, with no damage to the AR?

Tia,
Don

_________________
"Speeds fine, but accuracy is final"

QB-79, 22 cal
Airforce Condor 22 cal - pending


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PostPosted: Sat Jun 10, 2017 5:58 pm 
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Location: Coalmont BC
Almost any CO2 rifle can get liquid CO2 into the valve (there are a few exceptions, where the tank is underneath, facing forward).... It does not harm the gun in any way, but it does waste CO2, and depending on the temperature and relationship between valving and hammer strike, can change the velocity (up or down).... Usually you will not notice a change in POI, but you may see a "fog" in front of the muzzle.... This is very common in Crosman 22XXs for the first few shots on a new cartridge....

I can think of no reason that a QB would suffer damage from a dry fire, either empty, or charged with CO2 or HPA and no pellet loaded....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Sat Jun 10, 2017 6:14 pm 
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Joined: Fri May 05, 2017 11:41 pm
Posts: 48
Location: Western NV
Bob

This is the way my QB-79 will be adapted and shot/used etc,
see post #15 for photo,

http://www.rimfirecentral.com/forums/sh ... p?t=537160

I was concerned about the way the Co2 bottle/tank was pointed when taking hi angle shots
in the trees etc, with the Co2 being liquid and running into the AR etc.

Tia,
Don

_________________
"Speeds fine, but accuracy is final"

QB-79, 22 cal
Airforce Condor 22 cal - pending


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PostPosted: Sat Jun 10, 2017 8:06 pm 
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Location: Coalmont BC
Yep, typical QB79 arrangement.... I wouldn't have any safety concern, but as I say, high-angle shots with liquid CO2 in them may vary in velocity.... The main tube and valve is slightly above the tank.... so you could minimize the amount of liquid by dropping the muzzle below the tank between shots....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


Top
 Profile  
 
PostPosted: Sat Jun 10, 2017 9:52 pm 
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Joined: Fri May 05, 2017 11:41 pm
Posts: 48
Location: Western NV
Thank you, Bob

I'll make sure to do that after every shot.

Tia,
Don

_________________
"Speeds fine, but accuracy is final"

QB-79, 22 cal
Airforce Condor 22 cal - pending


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