Air Gun Home :: View topic - Increasing Power, and velocity on Gamo bigcat 1200.

Jordan4 · New Member

Hi, I was just wondering if there is a way to get improved performance out of the stock compressor in my gamo bigcat 1200. Are there any aftermarket performance accesories to do this? If not would getting a custiom made more powerful compressor spring be viable? Thanks.

Amigo · Veteran Member

Jordan, welcome to AirGunHome!

A stronger spring alone may not improve pellet speed, but could actually have an adverse effect. Piston assy. weight, lubricants, and an ideal pellet and pellet weight for your rifle along with trigger improvements, are other factors that could also improve performance.

Accuracy is also a component of performance. Were you actually inquiring about improving pellet speed consistency thereby enhancing the probability of improved accuracy?

Best regards,

Amigo

kanyon · Silver Status Member

broommaster2000 · Moderator

Upping the caliber can be good too. I'm not sure if you own a .22 or .177 one, or maybe even a .25-er? Not sure in which calibers they all come.

Jordan4 · New Member

What Im really looking for is the abitlity to get up to 1250fps or higher. its a .177 cal. Basicly looking to modify the power plant.

broommaster2000 · Moderator

That won't increase handling or accuracy. Neutral

kanyon · Silver Status Member

broommaster2000 · Moderator

Jordan4 · New Member

Who said anything about using light pellets. I want to use the heaviest pellets as I can. What a want is the ability to hurl a 15g pellet and have it retain significant ballistic coefficient at 100m. 8g pellets loose velocity exponetially after about 80m. If I use a 15g pellet with my stock setup the trajectory will be way too round. I appreciate everybodies input but does anybody have a method for obtain higher velocity, and power with my gun BESIDES suggesting pellets and other options. I simply want more air pushing the pellet out faster thats it anybody have a suggestion?

fritz · Silver Status Member

Jordan, your enthusiasm is excellent, your knowledge is limited, yet.

The power you get pushing a pellet in a springer is the spring. The air is simply a cushion.

One other major fact- super sonic ammo in airguns is futile, the general hourglass pellet design tends to tumble when moving super sonic resulting in loss of accuracy and velocity.

The best you can do for your guns is to give them a nice lube job, a JM spring, piston seal, and tender loving care. It seems you are expecting the performance of a medium-high powered pcp gun out of a springer.

If your 1200 shoots a 8gr pellet at 900fps it is performing very well, and will have great power out to 75 yards. Besides doing the tune job, select a good pellet. For that gun you want (it's a .177 right?) about a high 7 to low 9gr pellet, I recommend the Air Arms field target pellet, JSB exact, JSB preditor, Gamo hunter, and CPH.

Final statement: your best off doing some work and using the right pellet.

lauchlin · Supporting Member

Jordan4 · New Member

Ok thanks for the advice. The one thing that still puzzles me, and is what infuenced me to ask these quistions is the 1250 fps spring guns on the market. I figure if they can get away with it why cant I.

fritz · Silver Status Member

Well, it's possible that you could get 1250fps with a 30gr pellet in a spring gun, it's just pointless. I would equate it to buying a 747 for free peanuts.

Teryx · Veteran Member

Jordan,
If I may, I own a Gamo that was listed at 1000fps. In reality it couldn't break 800. The speeds listed on the box are pure fantasy, bordering on fraud. I sent my gun to the Tuna and got the full deal. Real speed went up to 880, but the best gain was in the way the gun shoots. Springers are a bugger to shoot accurately, and using a rest is extremely problematic. They also do NOT shoot heavy pellets well. My gun already has power that cannot be used at any extended range because the gun is just too hard to shoot accurately. If anything, it could probably benefit from LOWERING the speed and reducing the torque / recoil.

The stores are full of springers with great sounding specs, and they entrap a lot of people who just don't understand the problems with them. That is how I came to own one. Any gun is only as good as it's accuracy. It does no good to send a pellet PAST a squirrels head at 1250 fps.

In short, I wouldn't buy another one. I have a single pump on the way that is supposed to be a real shooter. It's speed is pretty low though. If I decide to move up in power I will look next at the PCPs. I firmly believe that hotrodding yours would be a total waste of time.

Teryx

broommaster2000 · Moderator

You said it, Ter! There is only one Rifle that will actually do 1250 Fps in .177, and that's the Diana 350 Magnum, and that's an impossible rifle to shoot in the first place... Neutral