Gamo P-25

Sig Sauer P230 (.380 ACP)

Made in Japan for Gamo, P-25
Replica Of:
Sig Sauer P230 (.380 ACP)
Made In:

.177, lead pellets, 16-shot double-ended clip
Air Source:
CO2, 12 g Powerlet

Recommended Pellet or BB:
JSB Match Diabolo (7.4 gr)
Weight (lb)/Length (in):
1.63, 7.75
Body Material/Finish/Grips:
plastic/metal, black, plastic
Barrel Length (in)/Material/Rifled:
5.13, steel, yes
Trigger Action:
DA and SA
Trigger Pull (lbs)/Adjustable:
7.5 (DA), 5.25 (SA), no
Sights (front/rear):
fixed, fixed
Velocity (fps):
450 (w/Gamo PBA pellets)
Sound Level (dB):
Thickness of Pellet Holder (in): 0.283
Manufactured Dates:
2010 - present
98%, yes, yes (backer card)
Serial Number:

Comments: The Gamo P-25, made in Japan for Gamo, is styled after the Sig P230 firearm. The P-25 has a metal slide that operates by blowback action. The frame is made of plastic. The finish is generally nice, although some seams are clearly visible on the plastic part of the gun. The blowback action is strong and gives the gun a good kick. However, the extra gas required to operate the heavy slide reduces the number of good shots per CO2 cylinder to around 50. The trigger is both DA and SA. In DA mode, the trigger pull is long and fairly smooth but it gets heavier toward the end. Also, just before the end of the pull, you can feel the clip being rotated as part of the trigger action. In SA mode, the pull is several pounds lighter but is still long and still has the catch in it associated with the rotation of the clip.

The pellet carrier (I will refer to it as the magazine for convenience) is an unusual design (similar to that of the Umarex Beretta PX4 Storm) that incorporates two 8-shot clips located at each end of the magazine. When one clip has been emptied, the magazine is flipped over and the gun is ready to fire eight additional shots. CO2 cylinders are loaded by pulling down on the backstrap to expose the CO2 chamber and piercing screw. The short piercing pin requires the use of CO2 cylinders that do not have a depression in the tip. The Gamo P-25 has acceptable accuracy (0.65") when used with the correct pellets (in this case, JSB Match Diabolo pellets). It has a fairly high muzzle velocity for a CO2 pellet gun (367 fps), but would need to be used with the very light Gamo PBA pellets to get close to the manufacturer's velocity claims. The shot-to-shot variation in muzzle velocity was poor. There are only a few CO2 pellet pistols with blowback action currently on the market. If you are looking to purchase a blowback pellet pistol, the Gamo P-25 is worth a look.

Owner's Manual for Gamo P-25 (.pdf)

Performance (lead pellets):
Measurements were made on 12/22/2010 at a temperature of 70 F and 5000' elevation. A ten shot string was fired from a bench rest at 15' using JSB Match Diabolo pellets (7.4 gr). The highest velocity measured was 418 fps, the lowest was 352 fps (average of the 10-shot string was 367 fps, s = 20). A five-shot string fired with open sights grouped at 0.65". Click the thumbnail below to see a larger image. Click here for a description of the measurement methods.

The Gamo P-25 was tested with the following pellets: Gamo Match (1.27"), JSB Match Diabolo (0.65"), H&N Finale Match Pistol (0.80"), RWS R-10 Match (1.08"), RWS Hobby (0.83"), and JSB S100 (0.88"). All groups were measured center-to-center. The smallest groups were produced with the JSB Match Diabolo pellets. Click the thumbnail image below to see the test targets.


Right Profile: The safety lever is located on the right side of the gun. Press down to engage the safety and back and up to disengage. This back and up action makes the safety lever difficult to disengage. When the safety lever is engaged, it decocks the gun.



Front View: Although the slide on the P-25 moves back and cocks the hammer when the gun is fired, the slide does not have a "locked open" position or a slide release lever.

Rear View: The front and rear sights of the P-25 are fixed and are marked with large white dots. However, the dots do not align properly between the front and rear sights and should be ignored while shooting.

Right Side Markings:

Left Side Markings:


Loading Pellets and BBs: Lead pellets are loaded into the dual 8-shot clip from the side with the depression. Pellets must be seated so that the tail of the pellet is even with or slightly below the face of the clip. Eight pellets can be loaded into the circular clips at each end for a total capacity of 16 shots.


Loading CO2: The CO2 cylinder chamber is accessed by pulling down on the backstrap. The backstrap comes completely off. This exposes the CO2 chamber as well as the piercing screw. Once a gas cylinder has been loaded, push the backstrap back into place. The piercing pin is short, so CO2 cylinders with flat tops (no depression) work best (Gamo and Crosman cylinders work fine).




Owner's Manual for Gamo P-25 (.pdf)



 Copyright 2011