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Air Gun Home Forum Index » Rifles » Crosman Phantom 1000 hole size    View previous topic :: View next topic  Crosman Phantom 1000 hole size   Posted: Sun Oct 31, 2010 10:21 pm GuitarMan New Member Joined: 28 Oct 2010 Posts: 3 Could someone give me the size of the hole at the end of the chamber (you know the hole where the air exit to push the pellet) of a crosman phantom 1000 ? I'm asking this question because I've notice that the hole of my crosman 500 have a smaller diameter than the barrel hole. Thank you!   Posted: Mon Nov 01, 2010 12:45 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Hi.. around 3mm.... DO NOT be tempted to drill it bigger...The size of the hole is what regulates the preasure in the chamber....Make it bigger the air exscapes easyer so the chamber reachs a lower preasure...Then a heayer pellet will be required.. To try and bring the preasure back up.... JUST DON"T DO IT _________________ Career Infinity PCP .22 Webley Patriot .25 Hatsan mod 75 .22 Hatsan mod 99 .177 (Quattro & SAS) Kral underlever .177 ............................................. .   Posted: Mon Nov 01, 2010 3:32 am AirGunEric Site Admin Joined: 20 Jan 2007 Posts: 6930 Location: "Out There" Some people have tried to expand the transfer port on the B18/B19/Quest/Phantom/etc. etc. platform, and as Kanyon has indicated- it has generally been nothing but a big disappointment and often results in other issues. Keep in mind that there is no difference in port size between a '500' and a '1000' version rifle- when it was designed the transfer port size was set-up to match the maximum amount of airflow that could come from the tube/compression chamber as equitably as possible. This is one of those modifications which will not work well unless you have a very specific reason for wanting to do it- i.e. like always using heavier pellets. _________________ ` I'd say "I care." But I'd be lying. Canadian Airgun Supplier: http://www.scopesandammo.com/storefront   Posted: Mon Nov 01, 2010 7:27 am GuitarMan New Member Joined: 28 Oct 2010 Posts: 3 AirGunEric wrote: Keep in mind that there is no difference in port size between a '500' and a '1000' version rifle. This is what I wanted to know. So there is no reason to expand the port. Thank you   Posted: Mon Nov 01, 2010 6:30 pm fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia What might happen if one where to make the transfer port smaller? _________________ "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: Mon Nov 01, 2010 7:03 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand fritz wrote: What might happen if one where to make the transfer port smaller? Would most lightly be like shooting over heavy pellets then yer could use those dam PBA things... _________________ Career Infinity PCP .22 Webley Patriot .25 Hatsan mod 75 .22 Hatsan mod 99 .177 (Quattro & SAS) Kral underlever .177 ............................................. . Crosman Phantom 1000 hole size     Air Gun Home Forum Index » Rifles 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." Your browser cookies have been reset or you need to register to access the topic in question. Use the 'Register' button near the top left of this page. Click Here for AirGunHome.com Main Page Powered by phpBB © 2001-2004 phpBB Group Partial Styling Supplied by Vjacheslav Trushkin Themes Database.