Ataman M2 performance quick view

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sniperlabyo

sniperlabyo

Member
Feb 25, 2016
756
86
NJ, United States
I had to evaluate the M2 regulator requirement prior to U.S. market, when I got her she was set up for high power for Russian hunting requirement. I had to restack the regulator for power and shot count, quick view on expected performance:






Un-like other BP that assemble the whole unit around the air tube, the Ataman use a long thick rail running from the end of breech to forward of the air tube clamp—all major components are screwed on to that rail and make the whole BP more steadier and solid---minimize POI shifting from the air tube flexing.



The barrel isn’t clamp by the air tube clamp it runs true two barrel band, kinds free floating on oring inside the band. same setup trigger linkage as the vulcan, but trigger adjustment is vary limited. the scope mount is 1/4" higher them most BP, heavier then most BP, Don't need a single shot tray when mag removed you can use two fat fingers to load direct to barrel, you dont have to remove mag to load pellets. 

here is the regulator that similar to Mutant/vulcan





Here is the Carbine shot count:

 
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"Michael"It sounds like the regulator was set for maximum power. Will Ataman be "restacking" the regulator to your specs?

I think it's great that the manufacturers reach out to people (like you, Ted, & Matt) who have their fingers on the pulse of the industry.
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I agree, it's awesome hearing from people that know what they're talking about like Ernest that will share his unbiased findings with the forums. The regulator certainly looks like it's doing it's job! Thank you Ernest!
 
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1st thing I did when I got her is take a shot string, she had a bell curve starting from 700fps, to over 1000fps and back down with 25g, I knew the reg wasn't working. 




Took a look at the reg disk spring stack-----said wow that's to strong ((()))((()))((())) so I arrange the stack on the 2nd photo (())(())(())(())() with this stack the pressure can be increase to get the 25G in the 950fps but to get the best combo of speed and shot count I lowered the reg pressure to shoot in the high 890fps.



Great for the end user that the MFR to listen and make improvement, FX Listens and ask questions the most to improve their products---they rather talk over the phone then sending emails. 
 
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"sniperlabyo"1st thing I did when I got her is take a shot string, she had a bell curve starting from 700fps, to over 1000fps and back down with 25g, I knew the reg wasn't working. 




Took a look at the reg disk spring stack-----said wow that's to strong ((()))((()))((())) so I arrange the stack on the 2nd photo (())(())(())(())() with this stack the pressure can be increase to get the 25G in the 950fps but to get the best combo of speed and shot count I lowered the reg pressure to shoot in the high 890fps.



Great for the end user that the MFR to listen and make improvement, FX Listens and ask questions the most to improve their products---they rather talk over the phone then sending emails.
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That seems like a disturbingly large bell curve for a regulated gun. That alone would make me hold off buying one of these guns until I heard reports from several other owners about the performance and saw results from shot strings. 
 
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"sniperlabyo"1st thing I did when I got her is take a shot string, she had a bell curve starting from 700fps, to over 1000fps and back down with 25g, I knew the reg wasn't working. 




Took a look at the reg disk spring stack-----said wow that's to strong ((()))((()))((())) so I arrange the stack on the 2nd photo (())(())(())(())() with this stack the pressure can be increase to get the 25G in the 950fps but to get the best combo of speed and shot count I lowered the reg pressure to shoot in the high 890fps.



Great for the end user that the MFR to listen and make improvement, FX Listens and ask questions the most to improve their products---they rather talk over the phone then sending emails.
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Ernest, just a little advice, if you stack the belleville washers all in the same way, you get a nice linear curve instead of a very progressive one. The single washers are twice as weak as the stacks of 2

It is not recommended to stack them like : (())(())(())(())() because the last 2 will be "crushed" because they are too weak in comparison with the rest.
If you stack them like: (())(())(())(())(( you'll get a nicer spring curve, because the washers are all stacked in sets of 2, which all require the same amount of force to compress them.

Kind regards,

Gijs

 
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if reg set at 135b coil spring isn't strong enough to keep the reg open and shut at 135b, coil spring are easy to compress by squeezing them with your fingers (sure you cant squeeze at head valve spring on a car but that's not going to fit in that small reg) no way you can do that with disks.

disks come in different thickness and stack them in any combinations (((()))((()))((()))---()()()()()()()()-(())(())(())(())- ((((())))(((()))))(((())))) to get the required strength / consistence, 

 
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I think Weatherby has a point, but given the flat surface on the left end of the regulator spindle, the washers could be ))(())(())(())(()) to get the best use of the springiness of all the washers with all of them in pairs.

The 2 on the right in Ernest's stack may be crushed or off the curve. The 2 on the right on Weatherby's stack may be wasted.

It could be that I don't know what I'm talking about.
 
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"MarkUK"I think Weatherby has a point, but given the flat surface on the left end of the regulator spindle, the washers could be ))(())(())(())(()) to get the best use of the springiness of all the washers with all of them in pairs.

The 2 on the right in Ernest's stack may be crushed or off the curve. The 2 on the right on Weatherby's stack may be wasted.

It could be that I don't know what I'm talking about.
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You're right Mark, that's exactly what I meant. I didn't look at the left/right side, only the order of stacking the washers, but indeed it is better to put in the belleville washers like you said.
If you stack them all double, an add 2 single washers to the row, you might as well replace them for a regular washer. But again that's just me (toolmaker background).
 
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