advice needed guys

[Mark112]

Hi,

Did you change position of the chrono for each test. Try 25 shots with it positioned 1mm lower and one with it 1mm higher. You should know withinin 25 shots whether you are likely to get a good string as shots should really be within a few fps of previous values. You seem to have jumps of 80+ fps which would equate to probably an inch at a 30m target. If you are not getting that then those figures cannot be genuine. Your last graph is improved so I still believe it's a chrono error/misread (I have had exactly this with mine).

Mark

S200AAOC2.jpg (62.55 KiB) Viewed 3742 times

[Matt1827]

ok mark did what you said and here are results.ps i put chrono on for first 30 shots and then moved it up 1mm for the second string.both 180 bar fill.and on shot 21 on the 2nd string i moved it again a bit and you can quite easily see what happened.

1.701
2.710
3.709
4.710
5.800
6.800
7.802
8.802
9.803
10.803
11.806
12.804
13.805
14.801
15.735
16.805
17.806
18.806
19.808
20.808
21.806
22.801
23.742
24.750
25.745
26.803
27.806
28.805
29.802
30.803

ok 2nd string.

1.801
2.801
3.802
4.722
5.721
6.805
7.803
8.727
9.735
10.806
11.737
12.807
13.735
14.736
15.804
16.739
17.742
18.805
19.806
20.741
21.807
22.742
23.808
24.806
25.806
26.806
27.802
28.801
29.799
30.801

so what do you reckon guys ha ps there is quite a few over the limit there two if its correct.

[Matt1827]

uptade.

just been out to zero the rifle at 30 yards because of all this fettling and those readings from the earler graths are defitnely right because even tho I zero it,some shots go 1/2 inch higher than zero and then some 1/2 inch lower than my zero and the rifle is locked in place so it cant be my moving ??its as if one shot is giving full 800 fps and then the next shot 730 fps in erratic order.enough is enough ill let you guys know what the shop says tomorrow,mabey he can put it over his chrono and see whats happening.cheers

[Roger5]

Sticky hammer or could be breech seal, that's my twopence worth anyway. Rog

[gary martin]

the S200 (normally) gives pellet on pellet groupings (& I should know) Raj & TT will back me up here, there is something wrong with that gun-take it back.

that's about as much advice you need on this subject, it is good advice.

[Matt1827]

Advice taken on board.cheers guys

[Mark112]

Hi,

Whatever you did for the first 30 shots is heading the right way in terms of better reading of velocities as can be seen here (I still think it's a misreading issue):-

S200AAOC3.jpg (77.01 KiB) Viewed 3715 times

That said it looks like the higher readings are the true ones and it needs taming somewhat. It would most probably be worse with JSB heavies or similar as well . Best get the dealer to sort it.

Mark

[Matt1827]

Yeh it's gone back to the shop today so we will wait and see.cheers

[gdavison]

Yeh it's gone back to the shop today so we will wait and see.cheers

good news .. keep us all informed

[Matt1827]

Hi guys had my rifle back from the shop,the owner of the shop reckons my brand new chronograph is not working correct because he put the rifle on his and the gun is firing consistent 755 fps so happy days.although I don't know why my chronograph is not working correctly??anyway I havnt had a chance to test the rifle yet but fingers crossed.

On another note.my 10 shot air arms kit came today now I installed it simple enough but it's destroying the o ring on the probe all the time?I've used 3 already.ive tried adjusting the adjuster on the magazine housing but just can't seem to get it lined up and cocking smooth?has any one else experienced this issue and have some advice.cheers guys