Author Topic: New Big Cat  (Read 3594 times)

Offline cheezie

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New Big Cat
« on: December 26, 2009, 11:56:04 AM »
I just got a Big Cat for C'mas and my first 20 pellets to sight it in at 25 yards have been like a shotgun!  Average off-sight distance is about 4 inches - a couple are tight, some are 8 inches off.  It is completely unpredictable.  I'm shooting from an adjustable bench rest through a 4x (32mm) scope that came with the gun.  I'm an experienced shooter and reloader (30'06, .223, 22LR, 9mm) but new to pellet guns.  I need to make sense of this gun.  Can anyone help?  Cheezie

Offline Phil_B

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RE: New Big Cat
« Reply #1 on: December 26, 2009, 12:34:18 PM »
First Welcome to the GTA
About your Big Cat it will take a few hundred rounds to break it in and calm it down a bit. Make sure all stock screws are tight then after a few shots check them again. Tighten down the scope and also recheck it often as well. Scope creep is most likely the cause
Most of all have fun shoot often and be safe:)
850 .22 HPA
Marauder .22 w/Leapers 6-24X50
Gamo Viper .177 w/ CenterPoint 4-16x40
Diana 26 .177 w/3-9x40
Diana 36 .177 w/RWS 3-9x40
Diana 46 .177 w/ NCstar mark III 10-40x50
Diana 48 .22  w/ CenterPoint 4-16x40
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Diana 350 Feuerkraft Pro Compact .177 w/Leapers6-24X50

Offline longislandhunter

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RE: New Big Cat
« Reply #2 on: December 26, 2009, 12:53:40 PM »
Welcome Chuck, nice to have you with us on GTA   :D

Phil has already given you some good advice.  

Have you cleaned the barrel ???  That should help the accuracy as well.  Since you're new to airguns you must remember not to use powder burner cleaning solvents in the air rifle.  All you need to clean the barrel is some "Goo-Gone", which is a citrus based cleaner available in most good hardware stores, a length of weed whacker line and some cleaning patches.  cut a length of weed whacker line, sharpen one end to a point so you can pierce the patch and thread it onto the line.  Heat the other end of the line with a lighter and form it into a round bulb and let it dry.  The bulb will prevent the patch from coming off the line as you pull it through the barrel.  Once you have a "Goo Gone" soaked patch on the line thread the line into the breech end of the barrel , push it through until it comes out the muzzle end and then pull the patch through.  Alternate with clean, dry patches until they come out clean.  No doubt there's a ton of "gunk" in  your barrel from the factory.  Don't use metal cleaning rods in  your air rifle, use the weed whacker line. You didn't say what kind of pellets you're shooting but stay away from the pointed pellets and especially the gold colored "PBA" pellets.  The PBA pellets are much to light and can damage the internals of your new gun by creating a situation where you get "piston slam"..... where the piston slams into the top of the piston chamber because the light pellet doesn't provide enough resistance.    Walmart sells Crosman hollow points..... they are usually a good pellet to start out with as they usually fly well in most guns and they are also a great hunting pellet.

Phil warned you about "scope creep".  The best way to avoid creep is to thoroughly clean the top of the receiver, the dovetail grooves and all parts of the scope rings (including the screw threads) with denatured alcohol prior to installing the scope.  Use a drop of blue loc-tite on the screw threads when installing the mount and scope and put the rifle away for at least 24 hours to let the loc-tite cure before shooting.  That procedure should insure that you don't have any creep.  You should also loc-tite the stock screws.

Even after you do all these things it will still take a few hundred pellets for the gun to "break in" and calm down,, just like Phil said.  

You will, if you haven't already, learn very quickly that shooting powder burners and shooting spring air rifles are two completely different types of shooting, but once you get used to the double recoil of the air rifle you will see your accuracy get better.  Also, most spring air rifles do not like a very firm grip.  Gently rest the forearm in your cupped hand lightly when you shoot, this may also greatly improve your accuracy.   Like anything else it's a learning process but it's a great sport and I think you'll wind up as addicted to it as the rest of us.  

Again, Welcome to GTA, I'll be looking forward to your future posts.....

JEff



\"If it was easy it wouldn\'t be hunting, it would be shopping.\"

Offline gamo2hammerli

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Re: New Big Cat
« Reply #3 on: December 27, 2009, 04:15:12 AM »
Welcome to the GTA forum and family.  Congrats on your Christmas gift.  Do as the posters above suggest...and try different pellets....stay away from the pointy ones (None of them shot well in any of my airguns....I think they're made for slow shooting airguns)....and very important DON'T shoot those PBA Raptors that came with your Gamo....they're too light for "1000" fps guns.....the pellets will give you a shotgun pattern and ruin you air rifle.  The dome pellets are usually the best for most airguns.  Wadcutters are good too....but not too good for further distances.
Gamo: Expotec .177 + Big Cat .177 + Viper .177 + Whisper .177, Hammerli Titan .177, Diana model 24 .177, RWS-Diana P5 Magnum pistol .177, Crosman: G1 Extreme .177 + Storm XT .177 + Sierra Pro .177 + 1377 pistol .177, Air Arms S410SL .22, BSA Scorpion T10 .22, FX Cyclone .177, Remington Air Master 77 .177 + BB\'s,

Offline crackshot777

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Re: New Big Cat
« Reply #4 on: December 27, 2009, 11:43:38 AM »
the crosman hollow points shoot good in my big cat i have a problem with the scope it came with so as soon as funds come available i would suggest a new scope.i can put three pellets in one hole with my big cat at 10 yrds easily.and it still is all stock for now..with the 3x9x40 gamo scope it came with which is alot to be desired. welcome to the forum and the addiction..lol

Offline dk1677

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Re: New Big Cat
« Reply #5 on: December 27, 2009, 11:46:05 AM »
Welcome to the GTA!
Hammerli 850, Beeman RS3 ,Gamo viper express,Crosman 180

Offline Furseeker

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RE: New Big Cat
« Reply #6 on: December 27, 2009, 11:47:02 AM »
Others have already given you the same advice I would have offered. I have one and I love it. I must have been lucky because mine seemed to have a short break in. It was accurate very quickly. I have tuned mine and now going through the second break in period but shooting it in my basement range I can have 5 shots touching at 12 to 15 yards. I'm getting older and my eyes aren't what they use to be, but the thing that helps me the best is a good high power adjustable objective scope. I'm a use to be varmit hunter so I alway put alot of glass on my rifles. It helps me to crank the sope up. Good luck with your new gun.

Offline cheezie

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Re: New Big Cat
« Reply #7 on: January 01, 2010, 08:54:42 AM »
Many many thanks for all the advice and counsel.  Does anyone know where to locate an exploded view diagram of the Big Cat.  I removed the two stock screws and the trigger assembly screws to investigate the bedding situation.  When I removed the barell/action little plastic and metal parts (4) tumbled out onto the counter.  Three of them are not obvious as to where they go and I need to be able to reassemble the rifle correctly.  I've e-mailed GAMO USA with the same question, but no answer expected over the holidays.

Offline crackshot777

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Re: New Big Cat
« Reply #8 on: January 01, 2010, 10:46:33 AM »
what did the parts look like maybe 2 roller lookin plastic pieces and a piece of plastic that looks kinda like a h. when i took my bc apart there were only 4 loose pieces when u take the screws loose at the front and back

Offline cheezie

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Re: New Big Cat
« Reply #9 on: January 01, 2010, 10:52:08 AM »
Yes, those are it, plus a stamped steel part about 1/2 x 3/4 inch and having a 3/8 inch hole.  Cheezie

Offline gamo2hammerli

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Re: New Big Cat
« Reply #10 on: January 01, 2010, 11:08:03 AM »
Hey Chuck, check the "Where do these parts go" thread in the Gamo Gate.  I think two of those parts that dropped out of your BC are the one's described there.  Also, I would think the stamped metal part that you mentioned would be the piece (Actually two similar pieces....sometimes glued together or separate) that would go into the stock near the trigger.  There are two slots inside the stock...one on each side.  You just need to slip the metal pieces into them.  The square bolt that holds the trigger assembly  goes into that hole....the metal piece(s) are used to align the receiver to the stock.  Hope this helps.
Gamo: Expotec .177 + Big Cat .177 + Viper .177 + Whisper .177, Hammerli Titan .177, Diana model 24 .177, RWS-Diana P5 Magnum pistol .177, Crosman: G1 Extreme .177 + Storm XT .177 + Sierra Pro .177 + 1377 pistol .177, Air Arms S410SL .22, BSA Scorpion T10 .22, FX Cyclone .177, Remington Air Master 77 .177 + BB\'s,