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Air Gun Home Forum Index » Pistols » Hpa 1740    View previous topic :: View next topic  Hpa 1740   Posted: Fri Feb 05, 2010 6:37 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Hi just got my 22xx thing finished... nothing to clever just a 14" .177 barrel & steel breech... But the Co2 is a waist of time.. so I intend to hang a tank on the rear to double as a stock...To get a 13ci tank/reg I need to import...$$$$$$..There are 13ci tanks for sale here for paint ball guns..but they have 850psi regs.. now what sort of FPS is possable at 850psi... 600/650fps "pellet dependent off course"...... pete   Posted: Fri Feb 05, 2010 7:09 pm fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia Why don't you try one and see? Should work well regulated at a low pressure. Lots of shots with low deviation. _________________ "I never set out to be wierd, it was always everyone else who called me it" -Frank Zappa Speed is impressive, accuracy is deadly. It's not that I'm not a people person, it's just that I'm not a stupid people person.   Posted: Fri Feb 05, 2010 8:26 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC The very first version I did of my 22XX PCP was using a hand pumped CO2 bottle at just 1000 psi.... with a Disco valve with the exhaust port and transfer & barrel ports opened up but nothing fancy.... It started with 14.3 gr. at 678 fps and dropped 15 fps by the time the pressure was down to 950.... I'm guessing it would be about 630ish at 850 psi in .22 cal.... with a 14" barrel.... I would leave the valve and ports stock (at least initially) in .177.... and I would think you would be well over 700 fps on 850 psi.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Sat Feb 06, 2010 12:08 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Thanks...better go whack the buy button... pete   Posted: Fri Feb 12, 2010 12:55 am sniper Silver Status Member Joined: 28 Nov 2008 Posts: 3752 Location: Star, Idaho see.... damnit! i have a marksman1010-POS and a broken crosman 357 anaconda. these threads continue to test my self control on getting into pistols. 14 fpe on an air pistol is the little cousin to a 1911 .45acp. _________________ I believe in gun control, If there's a gun around I want to be controlling it.......   Posted: Fri Feb 12, 2010 6:49 am packrat Senior Member Joined: 16 Nov 2009 Posts: 882 Location: Out in the woods...Ellabell, GA. Get that paypal account opened up and on-line!!!! Doesn't Crosman have a new Marauder PCP pistol in the 2010 catalog????? Lots of after market guys too...Mike @TKO, Roy @ Mountain Air, just to name a couple....I wonder if there's a TalonSS pistol yet? if not, I'll bet there WILL be someday........... _________________ HEY !! This getting old thing is NOT for sissies...   Posted: Fri Feb 12, 2010 11:05 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands packrat wrote: Get that paypal account opened up and on-line!!!! Doesn't Crosman have a new Marauder PCP pistol in the 2010 catalog????? Lots of after market guys too...Mike @TKO, Roy @ Mountain Air, just to name a couple....I wonder if there's a TalonSS pistol yet? if not, I'll bet there WILL be someday........... There's a dude who made something along those lines on the Dutch airgun forum. http://www.luchtbuks.net/index.php?showtopic=39722 _________________ BIG GAP   Posted: Fri Feb 12, 2010 6:44 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand rsterne wrote: The very first version I did of my 22XX PCP was using a hand pumped CO2 bottle at just 1000 psi.... with a Disco valve with the exhaust port and transfer & barrel ports opened up but nothing fancy.... It started with 14.3 gr. at 678 fps and dropped 15 fps by the time the pressure was down to 950.... I'm guessing it would be about 630ish at 850 psi in .22 cal.... with a 14" barrel.... I would leave the valve and ports stock (at least initially) in .177.... and I would think you would be well over 700 fps on 850 psi.... Bob Are the Co2 tanks the same tank as the HPA/air tank just with a diffrent valve..   Posted: Fri Feb 12, 2010 8:02 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC Paintball tanks for CO2 have the same valve as the output of a regulator (I guess it's actually the other way around, the CO2 came first).... It's 1/2" NPS - 14 thread (sometimes called 0.825 x 14) with a reduced diameter front section sealed by an O-ring and they usually have a "pin valve" in the center of the end.... depress the pin to open.... CO2 tanks are rated at 1800 psi maximum and have a 3K burst disc installed.... The 9ox. tank is 2 to 2.125" diameter depending on manufacturer.... The 13 - 22 cu.in. 3000 psi HPA tanks are 2.0" OD.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Sat Feb 13, 2010 12:36 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand rsterne wrote: Paintball tanks for CO2 have the same valve as the output of a regulator (I guess it's actually the other way around, the CO2 came first).... It's 1/2" NPS - 14 thread (sometimes called 0.825 x 14) with a reduced diameter front section sealed by an O-ring and they usually have a "pin valve" in the center of the end.... depress the pin to open.... CO2 tanks are rated at 1800 psi maximum and have a 3K burst disc installed.... The 9ox. tank is 2 to 2.125" diameter depending on manufacturer.... The 13 - 22 cu.in. 3000 psi HPA tanks are 2.0" OD.... Bob Thanks All.. just ordered a 13ci HPA tank with 850psi valve... hopefuly around 700fps with HIGH shot count.... Pete Here it is....done   Posted: Fri Mar 05, 2010 1:14 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Got it finished...Just waiting for the fill conector.. Its got a 215cc tank with 850psi valve so 700fps with a high shot count...Hopefuly Hpa 1740     Air Gun Home Forum Index » Pistols You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." 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