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Air Gun Home Forum Index » Rifles » Increasing Power, and velocity on Gamo bigcat 1200. Goto page Previous  1, 2    View previous topic :: View next topic    Posted: Sat Mar 21, 2009 7:35 am fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia Speaking of Dianas... does Diana over-state it's velocity like Gamo? I really need a chrono... _________________ "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: Sat Mar 21, 2009 7:45 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands They are not trying to do so, for as far as I know. _________________ BIG GAP   Posted: Sat Mar 21, 2009 12:53 pm Jordan4 New Member Joined: 19 Mar 2009 Posts: 8 Ok I understand your guys input but if I wanted to politely reject your replies and want to know how to increased the speed of my gun could somebody tell me nevermind that you correctley think its a bad idea however I still want to do it any advice please thankyou.   Posted: Sat Mar 21, 2009 1:16 pm broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands Longest sentence record two! Well, to increase power, you could try and get the biggest tunekit on the market. Then make sure you get a huge amount of preload on the spring, just enough so you can still cock it. Then get the Gamo PBA pellets and apart from the fact that you won't hit anything, or kill anything humanely, the killing recoil, the huge wear and tear on your rifle, you'll probably achieve those speeds. _________________ BIG GAP   Posted: Sat Mar 21, 2009 2:19 pm Teryx Veteran Member Joined: 17 Mar 2009 Posts: 119 Jordon, I'm not sure but if you do it, you will have to expect some difficulties, and spend time working around them. One is dieseling. That is why heavy pellets don't work well. They raise the pressure to the point of detonation. If you otherwise raise the pressure you will have to deal with the same detonation. If uncontrolled it will ruin whatever accuracy you might have, and destroy your gun. If you have a plastic barrel like my Gamo, you won't be able to raise the cocking effort much or you will run the risk of bending the barrel. I have also heard of solid steel barrels developing curvature on guns with high cocking effort. I suppose you could cut the barrel short and use a piece of pipe to cock it. We all like to tinker, but some things just weren't meant to be. These are some of the reasons why no one else has done what you propose. I wish you luck and if you do build a 1250 fps tack driver lets us know! Teryx   Posted: Sat Mar 21, 2009 4:20 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Jordan4 wrote: Ok I understand your guys input but if I wanted to politely reject your replies and want to know how to increased the speed of my gun could somebody tell me nevermind that you correctley think its a bad idea however I still want to do it any advice please thankyou. Ok..To get yer gun to 1250fps or better with heavy pellets.. I don't know of any after markets componts that will give you what you are after.....Do some measureing and fined the biggest spring that will fit a new seal / a debur and good lube..and hope. no one seems make the bits you require for the reasions mentioned. really its going to be a tryal and error project   Posted: Sat Mar 21, 2009 5:46 pm Jordan4 New Member Joined: 19 Mar 2009 Posts: 8 Anyone know were i can get springs of this nature?   Posted: Sat Mar 21, 2009 5:50 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Jordan4 wrote: Anyone know were i can get springs of this nature? Try here.... J Maccari www.airguns.citymax.com Or you could put pre load spacers "washers" on yer spring till its coil bound when its cocked "adding more preload"   Posted: Sat Mar 21, 2009 6:51 pm fritz Silver Status Member Joined: 25 Nov 2008 Posts: 2444 Location: New Jersey- outside of Philadelphia If you want 15+gr pellets moving 1250fps you need a condor or a bigbore with a small barrel. _________________ "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: Sat Mar 21, 2009 11:19 pm Amigo Veteran Member Joined: 18 Sep 2008 Posts: 263 Location: U.S. MidWest Jordan: In your several posts you have never mentioned owning a spring compressor or chronograph, both necessary items to initiate this project and document the results. Safety First Increasing Power, and velocity on Gamo bigcat 1200.     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 2 of 2   Goto page Previous  1, 2 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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