Low FPS

[Keyman62421]

I have been shooting my 22 cal. Wildcat for about 2 months. I'm getting to be a pretty fair shot. Some days I'm a rock and some days I'm a leaf. I figure you all know what I mean.
​If you hold the cross hairs on, you can dot an I. I've killed rabbits @ 100+ yds, ground hogs (a pretty good sized critter) @ 35, 45 and 80 yds. .Hit cans @ 80 -125 yds. So you can see this thing will shoot. 
​Here is my quandary. I chonographed my gun today so that I might use the Chair gun Pro app. 
​I find on a 10 shot run Ihave a max of 804 fps and a low of 775 fps. This seems to be nearly a full 100 psi less than advertised. Shooting JSB Heavy 18.3g. I am not one to "fix" something that is not broken!
​I only had 35 yds. available to do the max Chrony. 712 fps to 656fps.
​Now I am serious. this thing shoots exactly where you hold it. I made my own range card by ACTUALLY SHOOTING 5 shots every 5 yds. from 10 to 100. The chart works.
​ I am using a FFP Athlon MoA 6x24 Argos w/FX no limits. The Chair gun Pro seems to only work with mil dot and preferably a Hawke scope. Anyway, it is not even close to my PROVEN range card.
​1. should I do or say anything about the lower FPS? 
​2. Anyone see anything wrong with my home made card? If so I'd have to use some other app that would adapt to MOA .
​Just throw things at me. I learn every time I ask stupid questions.

 

[crosman2016]

Did the manufacturer list what kind of pellet and what weight they were doing their testing at, to give you their velocity rating?

 

[Keyman62421]

not aware. I was just thinking of that. when I shoot crosman 14.3 they zing!!!!
​I bet their @ 900+ also JSB 16's . I guess it's all relative. Like I said, I'm not complaining about accuracy.
​really not complaining about anything. just wondering out loud!

​I'll Chrony some 14.3 and 16 when I get a little time and report back.

 

[crosman2016]

Obviously we need a certain amount of velocity to get the job done, but I will take extreme accuracy over extreme velocity any day. 

 

[Hynzie]

If you're proven range card can. . dotThe eyes then screw chair gun app what kind of chrono are you using any chance there's a second one around you can use the phone one before you send your gun back make sure it's not the Chrono that's the problem

 

[Guest]

I do my range cards similar for shooting FT. Sit down and shoot every yard from 10yd-20yd then 35yd-55yd to get my clicks/holdovers. I've never bothered with a program and here is why. I've yet to meet a shooter who doesn't go out to the back yard or range and shoot at the distances he used a computer program for to make sure they are correct. Why not cut out the middle man and save some time by going to the range first.

 

[Dirte]

As for your apps I use Strelok Pro also. Pro is the paid side of the app, but worth the $12 I paid for it. They list most scopes including the Argos. Chairgun is Hawke's app. They do have generic mil setup but only list Hawkes beyond that. The nice thing about Chairgun is the graphs.

 

[xarus]

how far was the crono from the end of the barrel? I have a wild cat also and I am getting 880fps with the 18.1 jsb and the 900 fps that FX says is done with 16g jsb.

 

[Keyman62421]

I didn't measure exactly. estimate 24" to 30"

 

[xarus]

I think chairgun wants the speed measured at the muzzle. a inch or two. try that and see what speeds your getting. Joel