Hi,
I set up my FX Wildcat MK3 BT 22, 600mm slug liner to the max to try out what's the max speed to shoot different weight slugs.
I maxed out the hammer spring preload to max until the gun won't cock and gave it a 1/4 turn in. I kept increasing the reg up to 160 bar or 170 bar (my gauge was off by 100ish bar but I since had replaced it) until there's no more gain in speed, KO slug 25gr to 1130 fps. I kept shooting different weight slugs and control the speed with the 20-click hammer power wheel to find the right speed for each slug.
And then I heard a loud burst of air on my cheek. I thought the gun was out of timing, and checked the alignment of the pin probe relative to the sight hole, and it's still at where I set it up, slightly to the front and the two screws holding the cocking rod were tight. And the speed began to drop by about 100 to 150 fps.
I dismantled the whole gun. The small oring on the valve pin was busted. I replaced it with a new valve pin and the valve seat as well. I took out both Huma Air regs. Cleaned them up and replaced the orings. Filled in the gun with air to check for leak.
I went back shooting and i could not get the speed I was getting even though my set up was the same. Puzzled and I stopped shooting.
Here is the first question, what's going on?
Then i remembered about a YT vid about the importance of getting the length of the slug pin probe right. I went back and made sure that the length of slug pin probe seated the slug right at the end of the dual TP.
Before I could try it out, I had to go on a work trip. (sorry for the downer
)
This leads to my second question, does slug pin probe length matter? Usually I just set it to the longest I could, leaving just enough clearance for the mag.
I'm curious what do you think about these two, what I think are, interesting questions.
Thanks.
I set up my FX Wildcat MK3 BT 22, 600mm slug liner to the max to try out what's the max speed to shoot different weight slugs.
I maxed out the hammer spring preload to max until the gun won't cock and gave it a 1/4 turn in. I kept increasing the reg up to 160 bar or 170 bar (my gauge was off by 100ish bar but I since had replaced it) until there's no more gain in speed, KO slug 25gr to 1130 fps. I kept shooting different weight slugs and control the speed with the 20-click hammer power wheel to find the right speed for each slug.
And then I heard a loud burst of air on my cheek. I thought the gun was out of timing, and checked the alignment of the pin probe relative to the sight hole, and it's still at where I set it up, slightly to the front and the two screws holding the cocking rod were tight. And the speed began to drop by about 100 to 150 fps.
I dismantled the whole gun. The small oring on the valve pin was busted. I replaced it with a new valve pin and the valve seat as well. I took out both Huma Air regs. Cleaned them up and replaced the orings. Filled in the gun with air to check for leak.
I went back shooting and i could not get the speed I was getting even though my set up was the same. Puzzled and I stopped shooting.
Here is the first question, what's going on?
Then i remembered about a YT vid about the importance of getting the length of the slug pin probe right. I went back and made sure that the length of slug pin probe seated the slug right at the end of the dual TP.
Before I could try it out, I had to go on a work trip. (sorry for the downer
) This leads to my second question, does slug pin probe length matter? Usually I just set it to the longest I could, leaving just enough clearance for the mag.
I'm curious what do you think about these two, what I think are, interesting questions.
Thanks.
