I wasn't expecting myself to be having an issue with a brand new Impact MK2 .22. Here I am, reaching out to you all for advise and possibly some solutions to my problem that I am facing now.
I got the gun less than 3 weeks ago. Due to bad weather, I haven't been shooting it much, only 3 sessions in total as of today.
It came with factory setting at 90-95 bar, Max.
I shot the 18.1 gr JSB and got 854 fps average on my first outing on Sept.14.
2nd outing Sept.16 and got 837 fps.
3rd outing Sept.21 and got 837 fps as well. Full tin of 500 pellets done.
4th outing Sept 24, I adjusted the hammer spring by 4 turns (1/4 turns each time) and velocity went up to 840 fps
4 more turns yield 860 fps
4 more turns yield 893 fps
2 more turns yield 895 fps
2 more turns yield 897 fps. I stopped and noticed the point of impact were opening up. I knew I had to up the reg pressure, but I didn't have the proper tool that day.
Today Sept.25. I turned the reg up to 100 bar and noticed the velocity was 650 fps. I then turned the reg up to 110 fps and velocity dropped to 573 fps.
Now I was surprised and dumbfounded as to what was happening to my speed. The POI was way low as expected with the decreased of velocity from 895 down to 573 fps.
The next thing I did was turned the hammer spring back 16 small turns back to original and my speed was all over the place:
406, 424, 436, 476, 487, 481, 484, 474, 479, 452, 442
I had to stop.......
My question is: Do any of you experience this or know why this had happened?
I will emailing the vendor tomorrow and ask them what I should do next. I wasn't expecting this to happen, not after paying this type of money for it to malfunction.
thank you all for any comments and advice.
Alex
I got the gun less than 3 weeks ago. Due to bad weather, I haven't been shooting it much, only 3 sessions in total as of today.
It came with factory setting at 90-95 bar, Max.
I shot the 18.1 gr JSB and got 854 fps average on my first outing on Sept.14.
2nd outing Sept.16 and got 837 fps.
3rd outing Sept.21 and got 837 fps as well. Full tin of 500 pellets done.
4th outing Sept 24, I adjusted the hammer spring by 4 turns (1/4 turns each time) and velocity went up to 840 fps
4 more turns yield 860 fps
4 more turns yield 893 fps
2 more turns yield 895 fps
2 more turns yield 897 fps. I stopped and noticed the point of impact were opening up. I knew I had to up the reg pressure, but I didn't have the proper tool that day.
Today Sept.25. I turned the reg up to 100 bar and noticed the velocity was 650 fps. I then turned the reg up to 110 fps and velocity dropped to 573 fps.
Now I was surprised and dumbfounded as to what was happening to my speed. The POI was way low as expected with the decreased of velocity from 895 down to 573 fps.
The next thing I did was turned the hammer spring back 16 small turns back to original and my speed was all over the place:
406, 424, 436, 476, 487, 481, 484, 474, 479, 452, 442
I had to stop.......
My question is: Do any of you experience this or know why this had happened?
I will emailing the vendor tomorrow and ask them what I should do next. I wasn't expecting this to happen, not after paying this type of money for it to malfunction.
thank you all for any comments and advice.
Alex