by Tom Gaylord
Writing as B.B. Pelletier

Gamo Swarm Maxim
Gamo Swarm Maxxim repeating breakbarrel air rifle.

Part 1
Part 2

This report covers:

  • The scope
  • Pellet length?
  • Accuracy
  • What went right?
  • What remains?
  • Targets

Today I start testing the accuracy of the Gamo Swarm Maxxim multi-shot rifle. I decided to go straight to 25 yards, as that is the distance at which they say their scope is parallax adjusted.

The scope

The scope comes with the mount installed and all you need to do is attach it to the rifle. I found it very quick and easy to mount.

Gamo Maxxim scope base
The scope is installed in the rings when you get it, and the mount just has to be clamped on the rifle. Easy! The stop pin (right) slips into a hole on the Swarm base.

You absolutely cannot see the repeating mechanism in the scope. The image is clear. However, with a dot sight mounted at the same height the mechanism is clearly visible.

Last comment about the scope. It really is a poor optic! I adjusted the eyepiece3 to get the reticle and bullseye as clear as possible and still at 9 power I could only barely see pellet holes at 25 yards. Everything was out of focus. I resolve to mount a decent scope on the Swarm and give it another test, because this scope cost me 1/4- to 1/2-inch of group size.

Rather than walk you step-by-step through the test, I will cut to the chase and then show all the targets. The rifle I’m testing does not like to be rested directly on a sandbag. It want to have an artillery hold. I forgot to try the deer hunter (firm) hold, so I’ll have to do that in the next test.

Pellet length?

The Predator Polymag pellets I have are the shorts, so that also did not get tested. But that is a minor thing. I don’t care how long a pellet this magazine will feed. I only care about it feeding accurate pellets. And today I found none that were.


Since I didn’t know the rifle I had to test pellets and holds. I shot 5-shot groups to save time with this. The Predator Polymag short wasn’t very accurate when the rifle rested on the bag. I put 10 into 1.341-inches at 25 yards. Yeah, that’s not too good, is it?

Ten H&N Baracuda Match with 4.50mm heads went into 2.07 inches at 25 yards when the rifle was rested directly on the sandbag. With the artillery hold described above 10 went into 1.352-inches at the same distance. So that lends credence to the artillery hold being the way to go. But there is still a lot more testing to be done.

I tried Gamo’s PBA Platinum pellets, but they cracked like a .22! I shot a 5-shot group that measured 1.049-inches. That wasn’t bad (for the Swarm) but the noise was intolerable.

Then I tried 5 Crosman Premier lites. Two of them didn’t land on the target paper and the three that did have centers that are 1.505-inches apart. My guess is the 5 went into 2.5 inches.

I then tried 5 JSB Exact RS pellets. They went into1.544-inches when the artillery hold was used and 1.332-inches when the rifle was rested on the bag.

The last pellet I tried was the JSB Exact Jumbo Heavy that weighs 10.34-grains. Don’t ask me why but I shot 10 of them with the artillery hold, even when I could see they weren’t grouping. Ten went into 2.153-inches at 25 yards.

What went right?

With all these poor groups I am telling you about, did anything in this test go well? Yes, it did. First I want to compliment that trigger. It acts like a single-stage trigger in that you can feel it moving until the release. It’s light and very easy to use.

Next I want to compliment the Swarm for shooting as smoothly as it does. It’s not harsh at all. I enjoyed shooting this rifle, except for the results downrange.

Then there is the cocking that is so easy, what a delight it is.

And finally, the magazine functioned perfectly throughout the test. And, boy, does it speed things up! If the rifle was accurate, I would be calling it a world-beater.

What remains?

Well, I still have to find the best hold. That includes testing with the rifle held firmly. That is so contrary to how I normally shoot springers that I’m going to have to think about it.

I also have to mount a real scope on this rifle. My advice to dealers is replace the scopes and sell them as tent pegs.


Now, I will show you the targets.

Gamo Maxxim Predator bag
Predator Polymag short put 10 in 1.341-inches, when the rifle was rested on a sandbag.

Gamo Maxxim Baracuda bag
Ten Baracuda Match with 4.50mm heads went into 2.07-inches at 25 yards, when the rifle was rested on a sandbag.

Gamo Maxxim Baracuda artillery
With a artillery hold another 10 Baracuda Match pellets went into 1.352-inches at 25 yards.

Gamo Maxxim Platinum artillery
Using the artillery hold I put 5 Gamo Platinum PBA pellets into 1.049-inches at 25 yards. Not great but it looks good in this test. Too loud though!

Gamo Maxxim Premiers artillery
Three of five Crosman Premiers hit the target 1.505-inches apart. The other two pellets hit off the paper.

Gamo Swarm RS artillery
Ten JSB Exact RS pellets landed in 1.544-inches at 25 yards when the artillery hold was used.

Gamo Swarm RS bag
By resting the Swarm on the bag 6 JSB Exact RS pellets went into 1.332-inches. I only shot 6 pellets, both because I was getting tired, and they weren’t doing that well.

Gamo Swarm JSB Exact Heavy artillery
Ten JSB Exact Jumbo Heavys went into 2.153-inches, when the artillery hold was used.