by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2

Diana Chaser air pistol
The Diana Chaser is a new CO2 pistol.

This report covers:

  • The test
  • Qiang Yuan Match pellets
  • Adjusted the sights
  • JSB Exact RS
  • Pellets jamming
  • Trigger pull changed
  • Sig Match Ballistic Alloy
  • RWS Superdome
  • The magazine
  • Open sights visible?
  • RWS Superdomes through the magazine
  • Discussion
  • Surprise!

Today is accuracy day for the Diana Chaser air pistol. I threw in some extra tests just for fun. This should be interesting, so let’s go!

The test

I shot off a sandbag rest at 10 meters. I used the single shot tray for the first 4 groups, then switched to the magazine for the final group. There were some interesting results that I couldn’t have predicted.

Qiang Yuan Match pellets

I shot the first group with Qiang Yuan Match pellets. No particular reason for that, other than I had them ready. They hit the target low and to the left, but I left the sights where they were and shot all 10 pellets. They landed in a group that measures 1.052-inches between centers. This was larger than I had hoped for the Chaser.

Diana Chaser Qiang Yuan group
Ten Qiang Yuan Match pellets made this 1.052-inch group at 10 meters. It’s low and to the left intentionally because I didn’t adjust the sights.

Adjusted the sights

After this first group I adjusted the rear sight. I cranked in all the elevation it could take before the screw threads released. It also took a good bit of right adjustment. On the windage adjustment, the left screw is a locking screw that must be loosened before you try to adjust the sight.

JSB Exact RS

Next I tried the JSB Exact RS domed pellet. They fed easier than the Chinese wadcutters. And the first shot landed near the edge of the black bull at the top. It was well-centered.

After ensuring I was on paper with the first shot I didn’t look at the group again until I went forward to change targets. This time the 10-shot group measured 0.976-inches between centers. That’s better but still not as good as I was hoping for from the Chaser.

Diana Chaser JSB RS group
Ten JSB Exact RS pellets went just under an inch, at 0.976-inches between centers at 10 meters. At least we are in the black.

Pellets jamming

Several times in this test the pellets would jam behind the single shot tray, not allowing the bolt to go home. They had to be fished out with a pocketknife. The other way to remove them would have been to remove the tray. I had to hold the muzzle down when I loaded to prevent this from happening.

Trigger pull changed

I have the trigger pull adjusted very nice and when it works it works well. But every so often the trigger becomes stiff to pull and takes a lot more force to get it to break. It goes up to maybe 5-6 lbs. I don’t know what to do about this except hope that it goes away.

Sig Match Ballistic Alloy

The next pellets I tried were the Sig Match Ballistic Alloy target pellets. Ten of them went into 0.908-inches at 10 meters. They landed lower on the bull, though I didn’t adjust the sights this time.

Diana Chaser Sig Match group
Ten Sig Match Ballistic Alloy pellets went into 0.908-inches at 10 meters.

RWS Superdome

The last pellet I tested in the Chaser was the RWS Superdome. Superdomes are good premium pellets, but I didn’t know what to expect in this pistol. Oh, boy, was I in for a surprise! Ten of them went into 0.957-inches, with 9 in just 0.596-inches! It’s a surprisingly small group and easily the best so far.

Diana Chaser Superdome group
Ten RWS Superdomes went into 0.957-inches at 10 meters with 9 in 0.596-inches.

The magazine

Up to this point everything has been single shot. Lest we forget, the Chaser accepts the same magazine as the Diana Stormrider and the Seneca Dragonfly. In .177 caliber the mag holds 9 rounds.

Open sights visible?

There was some concern that the open sights might be obscured by the magazine, because it stands up above the top of the receiver, but that was not a problem. There is plenty of room to see both sights with the mag installed.

Diana Chaser mag installed
When the 9-shot magazine is installed you can easily see both front and rear sights and get a good sight picture.

RWS Superdomes through the magazine

I loaded the magazine with 9 RWS Superdomes. After their performance single-shot I wasn’t going to try anything else. Then I shot them. This is 9, not 10. They fed faster through the magazine, of course, but I didn’t expect the same accuracy. And I was right I didn’t get the same results.

The magazine out-shot the single shot tray! Another time-honored “rule” has been broken. I’m sure those who buy the rifle will be pleased to read this, as that would be the only way to shoot it — scoped with the mag.

Nine Superdomes went into 0.753-inches at 10 meters, with 8 of them in just 0.487-inches! One group isn’t conclusive — even when it’s 10 shots, but at this point it does look like the magazine and domed pellets are the best way to go with the Chaser.

Diana Chaser Superdome through mag
Nine RWS Superdomes shot from the magazine went into 0.753-inches at 10 meters, with 8 in 0.487-inches.


Okay, what I said at the start of Part 1 is now true. This is a world-beater air pistol, and I have to believe the rifle will be the same. Bob — go ahead and buy one — I don’t think you will be disappointed.

I’m not done yet. I wish I had the rifle to test, but I plan to test this pistol at 25 yards with some sort of optic installed.


I have one more thing for you today. It’s a target.

Five Sig Match Ballistic Alloy pellets went in 0.338-inches at 10 meters. Nice group, and I hope to do better!

I shot this target after testing the Chaser. It was shot with a different air pistol — one you have not yet seen because I haven’t tested it yet. But you have heard about it. This is the first time I have shot it. Wanna see it Friday?