Other Ultra-Dot On The IZZY

Glad to see you have it repaired and shooting again. Good choice on the MatchDot!
I have a similar setup and was surprised at the 25 yard accuracy.

very nice setup
Ultra Dot sights are very good, i have a couple laying around

Frank in Fairfield said:

Hmmm.
Off of the bench you should do better than that.
I had the Ultra-Dot as an option for my Ruger MKIII but I have a 2X scope for that pistol and prairie dogs..
The mechanic (a Russian guy) said the piston was set too far forward increasing the speed but also allowing the piston to strike up against the valve body which put pressure on the link and broke it.
He put in a new link, replaced all the seals and adjusted the piston.
He also threw in two sets of breech seals.
I will be 80 on Sunday, next, and now the IZZY will last forever.
Note: You may want to try a heavier and tighter pellet…..4.52mm and 8.2gr…

Click to expand...

Not sure if this was for me but that target was shot at 25 yards standing, offhand with 2 hand hold, unsupported.
The only time I shoot a pistol off the bench is when I’m sighting in an optic or over a chronograph.

What velocity is your Izzy shooting at now after the stroke was adjusted?
Mine was bought out of Canada so shoots the 7.0g MeisterK’s at 443 fps and the 8.2’s at 423 fps. Think Canada limits velocity to 500 fps.

Interesting that mine shoots the JSB Match 7.33g at a muzzle velocity of 448 fps which is 5 fps faster than the RWS Meister 7.0g which is a lighter pellet. Check out the 1.4 std deviation!

Created: 02/23/25 09:57 AM
Description: IZH 46M 20462171 JSB Match 7.33/4.50
Notes 1: Home 2100‚
Notes 2:
Distance to Chrono(FT): 1.50
Ballistic Coefficient: 0.011
Bullet Weight(gr): 7.33
Temp: N/A °F
BP: N/A inHg
Altitude: 0.00
# FPS FT-LBS PF
10 444 3.21 3.25
9 444 3.21 3.25
8 444 3.21 3.25
7 444 3.21 3.25
6 441 3.17 3.23
5 443 3.19 3.25
4 444 3.21 3.25
3 441 3.17 3.23
2 445 3.22 3.26
1 445 3.22 3.26
Average: 443.5 FPS
SD: 1.4 FPS
Min: 441 FPS
Max: 445 FPS
Spread: 4 FPS
Shot/sec: 0.0
True MV: 448 FPS
Group Size (in): 0.00