by Tom Gaylord
Writing as B.B. Pelletier
This report covers:
- Quick review
- More arrows
- Sight in
- At 10 meters
- At 20 meters
- Raise the sight
Today I shoot the Umarex Air Javelin at 20 meters with a dot sight that has been sighted in. You finally get to see the sort of accuracy that I saw at the SHOT Show in January. The range there was set up for about 25 yards and it seemed like the arrows all went to nearly the same place! You will see that today.
Part 4 was a test with a dot sight too, but I also tested the Umarex CO2 adaptor that allows you to use two 12-gram CO2 cartridges. Unfortunately the Tasco Pro Point dot sight I used for that test could not achieve the elevation that was needed to hit the target at 20 meters. I also shot wide of the target bag when I shot an arrow that had been damaged in the rear from a Robin Hood. I didn’t know it was damaged until I pulled it from the fence and examined its base.
The adaptor only gave me 8 powerful shots. A reader told me that he gets 12 powerful shots. He asked me to check the ends of both cartridges to make sure both had been pierced. I did and both had been pierced for sure. I learned years ago when using multiple CO2 cartridges to back off on the piercing screw to allow the gas to push the bottom cartridge up away from the piercing pin and flow better.
The same reader also said that the holes in the CO2 cap are to allow the gas to exhaust the end of the run, and indeed that is correct. However, I discovered that the adaptor was stuck in the gun after shooting until I inserted an Allen wrench into one of the holes to break it free — so what I said about using the hole for that purpose also applies.
In Part 4 I lost one of the three arrows that came with the AJ and a second one was damaged by another arrow hitting its rear in a Robin Hood shot. So I emailed Umarex and asked for a couple more arrows to continue testing and by the end of the week they had sent me six. Those arrows made today’s test possible. With the one arrow I have that gives me 7 to test.
For this test I installed a fresh 88-gram CO2 cartridge in the AJ. I didn’t want anything to spoil the test. I also switched from the Tasco Pro Point red dot sight to a UTG Reflex Micro green dot. I knew from experience that this sight has a wide range of adjustments, which the AJ I’m testing needs.
I learned a valuable lesson last time. Always sight the AJ in at close range after installing an optical sight, or you may miss the target bag altogether. This time I started at 5 meters. The arrow hit high enough but to the left of the bull. I adjusted the sight to the right for the second shot and it landed inside the bull about an inch away at the same height. That was enough for me, so I took the target bag out to 10 meters and shot again.
At 10 meters
This time the arrow landed at the bottom center of the bull. A second shot hit next to the first one. Neither arrow was damaged, bit I learned that 10 meters is too close to sight in. We don’t mind pellets going into the same holes when we shoot, but with arrows it’s a completely different story.
Maybe the lesson should be expanded to pull each arrow as it’s shot when you are sighting in. The centers of these two arrows are 1/2-inch apart. But I didn’t pull them out of the bag.
At 20 meters
Now I moved the target bag out to 20 meters and fired again. This time the arrow hit about an inch and a half lower and maybe an inch to the right of the two shots at 10 meters. I left all three of these arrows in the bag., I expected the arrow to drop at 20 meters, but the sight should be able to compensate for it.
Raise the sight
I adjusted the UTG Reflex Micro dot sight up by 11 clicks. I didn’t know exactly what that would do at 20 meters, but I do know that the clicks move the point of impact quickly with this sight.
The first shot hit inside the bull and slightly above the centerline. It was almost straight up from the previous arrow that had been fired. Through dumb luck I had adjusted the sight up by the correct amount. I bow hoped to shoot a group of several arrows for you, but then a bad thing happened.
The second shot at 20 meters was a Robin Hood that damaged the back of the arrow shot just before. Okay — even 20 meters is too close to shoot the AJ without pulling the arrows after every shot! I need to move the target bag out to at least 35 yards before I test the Air Javelin again. And, I am writing this reminder to myself for that test. Put three clicks of left adjustment into the sight and then pull each arrow as it is shot at 35-40 yards!
This is the target paper with all the arrows removed. The two holes on the left are the 5-meter sight-in. The two holes at the bottom of the bull were the next two that were shot at 10 meters. The bag went out to 20 meters and then I shot the lowest hole on the target. The sight then went up by 11 clicks and I shot shot the two holes at the top right at 20 meters.
Rather than waste arrows I plan to shoot another test at a longer distance. I will probably also pull the arrows as I go.
I now have 6 good arrows left — one of the three that came with the AJ and five of the six that Umarex sent me to continue this test. It’s obvious that I have to be very careful because the AJ wants to put all the arrows into the same place. This accuracy is very equivalent to what we saw with the Sub-1 crossbow at close range. But the AJ is well over a thousand dollars cheaper.