by Tom Gaylord
Writing as B.B. Pelletier

Sheridan Supergrade right
My new Sheridan Supergrade is in fantastic condition, despite the wood check at the butt.

Sheridan Supergrade
The cheekpiece makes the Supergrade stand out!

Part 1
Part 2
Part 3

A history of airguns

This report covers:

  • The test
  • Sheridan Cylindrical
  • JSB Exact
  • Adjusted the sight
  • Velocity
  • Crosman Premiers
  • H&N Field Target Trophy
  • Next

Today we test the accuracy of the Sheridan Supergrade at 10 meters. Let’s get started.

The test

I shot off a sandbag rest at 10 meters. The rifle was pumped 4 times for every shot. As you learned Friday, the trigger was set as light as it will go, which is 4 lbs. 10 oz.

I decided to shoot 5-shot groups and then to select the best pellet to shoot a 10-shot group. I went that way because a multi-pump takes so long to get ready for each shot.

Sheridan Cylindrical

In their day Sheridan Cylindrical pellets were the finest pellets available in any caliber. They were only made in 5mm or .20 caliber and the Sheridan rifles were the only airguns currently being produced in that caliber. Since there were no other .20 caliber pellets available at the time (late 1940s through the 1960s), it’s fortunate these were so good. They were also the only game in town!

Five Sheridan pellets went into 0.44-inches at 10 meters. I expected the other pellets to do better because these pellets haven’t been as accurate as the best premium pellets since the 1990s, in my limited experience with .20 caliber.

Sheridan group
Five Sheridan pellets went into 0.44-inches at 10 meters.

JSB Exact

The pellets I expected to do the best were the JSB Exact domes. I don’t have much experience with .20 caliber, but most of it is with a Blue Streak where these pellets shine. In the Supergrade 5 went into 0.193-inches at 10 meters. In the end this turned out to be the best 5-shot group, although I didn’t know it at the time. I was looking at the target through the spotting scope and got fooled by a different target.

JSB group
Five JSB Exact domes went into 0.193-inches at 10 meters. This was the best 5-shot group, though I didn’t know it at the time. It looks worthy of the trime!

Adjusted the sight

Both groups landed in a similar place — to the left of the target and slightly high. I will leave the elevation where it is because at farther distances I will need it. But I decided to adjust the rear peep sight to the right.

This kind of sight simply slides and gets locked down, so it isn’t a precise adjustment. Also, as you are screwing the locking screw down it sometimes slides the sight a little. These can be fiddly to adjust.

Crosman Premiers

Next up were the Crosman Premiers that are no longer made. I thought they would group like the Sheridan pellets but they surprised me by going into 0.235-inches at 10 meters. Through the scope they looked as good as the JSBs.

Premier group
Five Crosman Premier domes went into 0.235-inches at 10 meters.

As you can see, the Premiers landed a little to the right of center, so I tried to adjust the rear sight back a little. It did slide around as I tightened the locking screw, so I did the best I could.

H&N Field Target Trophy

The next pellet I tested was the H&N Field Target Trophy. Five of them made a 0.327-inch group that looked much smaller through the spotting scope because a flap of target paper went back in place.

HN FTT group 5
Five H&N Field Target Trophy pellets went into 0.327-inches at 10 meters.

At this point in the test I resolved to shoot 10 pellets with the pellet that did the best 5-shot group. At the time the FTT pellets looked like they were the best, so I went with them.

Ten FTT pellets went into a group that measures 0.33-inches between centers. That’s a 10-shot group that’s almost the same size as a 5-shot group with the same pellets. This is the unicorn of groups because 10 shots are almost never as good as 5, if everything else is the same! It also speaks to the consistency of this Supergrade.

HN FTT group 10

Ten H&N FTT pellets went into 0.33-inches at 10 meters. That’s almost as small as 5 shots!

Next

With results like these I think I have to take this rifle to 25 yards. So that will be next.