I was testing different pellets at 35 yards with my Benjamin Cayden .22 today. I’ve “tuned” the rifle by shortening the original 3.5” hammer spring to 2.8”. This resulted in improved efficiency and shot count. I now get 50 shots with a 20-25 fps spread. Otherwise, the Cayden is completely stock. One very cool thing about the Cayden (and Akela and Kratos) is the power adjuster knob. This allows a continuously adjustable Transfer Port size. Essentially, the way I set up my Cayden is to adjust the hammer spring tension to shoot my heaviest pellets at my preferred velocity with the power adjuster a full open. Then I can leave the hammer spring alone and just turn the Power Adjuster (Transfer Port) knob DOWN when I shoot lighter pellets - essentially using the “power knob” as a transfer port restrictor. This gives you the ability to shoot pellets at whatever speed works best - WITHOUT having to touch your “tune” of the hammer spring.
Today, I was testing JSB 18.13s and I forgot to return the power adjuster to full open. I had previously tuned the hammer spring to shoot JSB 18s at 865fps. I had my chrono on and saw 719fps on the 1st couple shots - whoops - but both shots went through the same hole. So I keep shooting at 719fps. These are the 2 ten shot groups.
I would have never known that there was an “accuracy node” with this pellet and rifle combo at 719fps if I had remembered to set the power adjuster back to “full open” prior to shooting the JSB 18s. But by accident, I found that you can achieve excellent accuracy & consistency at lower velocities than everyone is shooting their PCPs at these days.
I love my Cayden, .177 Akela and their power adjusters - they make it SO easy to experiment with pellet velocity - much easier than most guns.
Today, I was testing JSB 18.13s and I forgot to return the power adjuster to full open. I had previously tuned the hammer spring to shoot JSB 18s at 865fps. I had my chrono on and saw 719fps on the 1st couple shots - whoops - but both shots went through the same hole. So I keep shooting at 719fps. These are the 2 ten shot groups.
I would have never known that there was an “accuracy node” with this pellet and rifle combo at 719fps if I had remembered to set the power adjuster back to “full open” prior to shooting the JSB 18s. But by accident, I found that you can achieve excellent accuracy & consistency at lower velocities than everyone is shooting their PCPs at these days.
I love my Cayden, .177 Akela and their power adjusters - they make it SO easy to experiment with pellet velocity - much easier than most guns.