Dragonfly Mk2
Dragonfly Mark 2.

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Part 9
Part 10
Part 11
Part 12
Part 13

This report covers:

  • The test
  • 4 pumps
  • 5 pumps
  • 6 pumps
  • 7 pumps
  • 8 pumps
  • 9 pumps
  • What have we learned?
  • Summary

Today we advance the 25-yard accuracy test of the Seneca Dragonfly Mark 2 multi-pump rifle. We are testing which number of pump strokes is the best. I will explain the details as we go.

We started this test in Part 13, when we discovered a good pellet. That was the Air Arms 16-grain dome that gave us 5 shots in 0.331-inches at 25 yards on 8 pump strokes. Now we use that pellet alone, and test it by shooting groups with differing numbers of pump strokes from 4 through 15.

The test

My plan is to pump the rifle 4 to 15 times per shot to shoot groups with this pellet. Today I will pump 4 through 9 times per group, which gives us 6 groups. The next time I will complete the test by pumping 10 through 15 times per group, giving us another 6 groups. 

That is a lot of pumping, but in the end there will be just one group per set of pumps, so the data isn’t conclusive. I’m hoping we see a relationship that suggests what the best number of pumps is — something like 7 to 9 pumps seems best — FOR THIS PELLET AT 25 YARDS.

Guys, if you think about what you just read you’ll soon realize that this could be a lifetime of testing and still never cover all the bases. I’m doing this because we all want to know, but I’m not going to make this my life’s work!

I’m shooting off a sandbag rest at 25 yards indoors. The Dragonfly is rested directly on the bag. The rifle is scoped with a UTG Bug Buster 3-12X32 scope that was zeroed in Part 13. I have purposely not centered the shots inside the bullseye to preserve the aim point. Let’s begin.

4 pumps

With 4 pumps the rifle put five shots into a group measuring 0.483-inches between centers. I was surprised that it hit the bullseye and of course it took out the aim point, but that wasn’t as big a problem as I thought. This is the second-largest group of today’s test and this number of pumps is definitely not recommended for accuracy. However, compared to many air rifles this is an okay 25-yard group.

Dragonfly 4 pumps
On 4 pumps the Dragonfly put five 16-grain Air Arms domes into 0.483-inches at 25 yards.

5 pumps

Surprisingly 5 pumps gave the best group of today’s test. I blew away the aim point with the second shot, yet I still managed to put five into 0.196-inches between centers. That’s good for the silver trime. And it proves I don’t need the aim point to shoot well.

Dragonfly 5 pumps
With 5 pumps the rifle homed in on the target, making the smallest group of the test, at just 0.196-inches between centers. Not bad for 25 yards!

6 pumps

On 6 pumps the rifle put five into 0.492-inches — the largest group of the test. Notice, too, that the group dropped lower. I am amazed that there are such dramatic differences with just a single pump — open with 4 and 6 pumps and tight with 5. This suggests an additional test after testing with all the numbered pump strokes is completed.

Dragonfly 6 pumps
On 6 pumps the group opened to 0.492-inches at 25 yards. And the point of impact dropped.

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7 pumps

On 7 pumps the point of impact dropped even lower and also went to the left. But the pellets stayed together in a group that measures 0.382-inches between centers. So the group movement was real. That is a fact we have learned. The number of pumps affects where the pellet goes. They are all hitting inside the black at 25 yards, but it’s still something to keep in mind.

Dragonfly 7 pumps
On 7 pumps the Dragonfly put five pellets into 0.382-inches at 25 yards.

8 pumps

On 8 pumps the point of impact remained to the left of center but climbed just a bit. It’s lower than the group shot with the same pellet on 8 pumps in Part 13, but it’s close to the same area. In Part 13 five pellets are in 0.331-inches and in this test with the same number of pump strokes 5 are in 0.293-inches. That is the only confirmation group (more than one group with the same number of pumps) that we have and look how close it is. That is impressive!

Dragonfly 8 pumps
Eight pumps put 5 pellets into 0.293-inches at 25 yards. It’s the second smallest of this test.

9 pumps

This is the final group for today’s test. On 9 pumps five pellets went into 0.357-inches between centers in a nice round group. 

Dragonfly 9 pumps
On 9 pumps the Dragonfly put 5 into 0.357-inches.

What have we learned?

For starters we learned that groups are very affected by just one pump stroke. Now remember what I said at the start — this test isn’t conclusive. However, it does point out what other tests might be done WITH THIS PELLET AT 25 YARDS. Like I said — this could become a lifelong exercise!

We have also seen how the point of impact moves dramatically with just one pump stroke. And, in case you didn’t notice, it moved around in a clockwise circle as the pump strokes increased. That is the same direction as the twist of the rifling.

I will tell you right now that there were no called pulls in today’s test. All shots went where I aimed them. Given the sandbag rest and the Dragonfly’s light trigger it’s hard to make a mistake.

Summary

This test could only be done with the Dragonfly Mark 2. Any other multi-pump would flat wear me out. I pumped the rifle 195 times for this test. And on the next test where I pump 10 to 15 times per shot the count will be 375. I must really love you guys to go through this!