offering low powered tune for Big Cat 1200

[Raj]

speedturtle - 12/24/2009  2:13 AM

One possible solution:

Take off the top hat. Take out the rear spring guide block. After doing that you shorten the piston spring in such a way that there is no spring preload at all. Use a very loose fitting piston seal to literally allow air to bleed through the piston seal. Take off the breech seal on the barrel. Cut off about 6 - 8 inches from the length of the barrel and then do a chrony test. If it is still a bit high then cut some more coils on the spring. Your only objective in doing this is to pass custom certification. Once you're good to go ship the original parts in a separate package and just re-install everything.

Using the Crosman G-1 Extreme as my platform from 850FPS I've lost about 300FPS by just simply forgetting to install the breech seal! LOL! My mistake but that mistake later taught me that there are a lot of ways to detune an airgun to shoot better. Hehehe. at 550FPS the recoil is very light making the G-1 good for paper targets.

Good luck. Too bad I can't do this experiment for you since I can't afford to buy a Big Cat right now and test this mod.

Give BIg Thanx speedturtle! you`ll be my lighthouse, feel you are the man!  PM me pleasee.
Respect

[Dehouser]

Raj - 12/22/2009  5:01 PM

Greetings.
Im new to here, invited by Charlie from Charliedatune.
now I wanted to get Big Cat 1200 in lawful outtah here Im livin in Japan...
I do Room Air Precision Shooting (10~15 meters with rifle - standing) with my Gas operating Rifle but its almost controlled by temperature.
and so I want to get Gamo Air n search a lot of web shop n Forums, reviews.
then I met the Big Cat 1200, is great shape, lookin oldschool, I love it...
well, here we has the rule for energy that the Air/Gus Rifle/Pistol cannot has the power over 1 Joule...
its, about under 250~260 FPS with 5 grain pelllet.
and also JP Customs does not allow to import this kind of powerful Rifle ( they check the power @ customhouse.)
So I want to meet the man who could buy it and weakened tuning like,, change the mainspring to super weak one or something simple method.
I have the budget $300 + SHIPPING for this offer.
someone might say buy toy gun ot something but my target is Gamo Big Cat.
please understand :0

does anyone can do this tuning? or are there any other good tuning shop which can be order online?

Thank you very much for read my post.

Here, try this: http://www.catsdomain.com/

In all seriousness, I wish you all the best in your quest, but it appears to me to be a tricky one.

[speedturtle]

Dehouser - 12/26/2009  5:08 PM

In all seriousness, I wish you all the best in your quest, but it appears to me to be a tricky one.

I perfectly agree with you Dehouser. However tricky it may be, I think all that he is asking is to have the Big Cat shoot at about 250FPS without any regard to accuracy. It would be funny to look at the facial expressions of those Japanese custom officials when they test Raj's Big Cat performing like an anemic airgun! LOL! I think one more thing that could help Raj to pass custom inspection is to declare the airgun as a "used" one so that they will not question why the Big Cat performed poorly during firing. Hehehe. There are a lot of ways to skin a cat... a Big Cat in this sense. LOL!