Beeman makes the single pump pneumatic .177 pellet pistol called a P3 there are several variations of this German pistol like the "Marksman 2004" made in China and a few other less valuable and less quality.
As long as the pellet is .177 Cal then any .177 caliber pellet will work in your .177 Gamo.
No. a 177 is a 4.5mm pellet. A 5mm is a 20 cal pellet. A 5.5mm is a 22 cal pellet Don't try it in the wrong airgun.
Use a .177 cleaning rod and push the pellet back out of the loading port.
Any air gun or rifle that uses a .177 Caliber pellet can use the Gamo .177 Red Fire Pellet. No matter who makes the air gun. The Caliber .177 is universal to all .177 caliber pellet guns or rifles.
The best for what? Paintball, .177 Pellet, 6 mm pellet or bb rifle?
175m/sec with 0.45gram pellet.
Simple: With the Safety On. Slide a cleaning rod down the barrel to dislodge the pellet from the loading port. Yes there are cleaning rods for pellet guns. They are 177 caliber.
With the right pellet you you can, But it should be a hunting Pellet (Hollow-point) and it should be a heavy pellet not a light weight pellet with at least 900 to1000 FPS.
diameter
Cal .177
You will need a .177 caliber cleaning rod to push the pellet back into the loading breech from the barrel.