Air Arms Owners Club

hi guys I bought a aa s200 177 mk3 2 weeks ago and have been trying to find the sweet spot on the fill.ive done a chrono test a 180 bar fill down and here are the results,is this ok or not because I don't really know if its any good or not,all I know is there was a couple in there over the 12ft lbs limit and this gun is brand new from the shop out of box,havnt been tamperd with in any way.ps. ive put about 1000 pellets through it so far.

180 bar fill jsb excact diablo 8.44 gr

1. 787 36. 781
2. 792 37. 754
3. 696 38. 752
4. 693 39. 800
5. 705 40. 758
6. 706 41. 754
7. 797 42. 758
8. 801 43. 801
9. 801 44. 759
10. 712 45. 797
11. 800 46. 751
12. 806 47. 793
13. 805 48. 793
14. 713 49. 742
15. 724 50. 758
16. 723 51. 760
17. 729 52. 763
18. 807 53. 752
19.804 54. 758
20.729 55. 786
21. 806 56. 745
22. 806 57. 759
23. 732 58. 753
24. 806 59. 777
25. 806 60. 774
26.726 61. 770
27. 803 62. 765
28. 744 63. 758
29. 742 64. 749
30. 747 65. 746
31. 805 66. 737
32. 749 67. 754
33. 807 68. 725
34.804 69. 740
35. 802 70. 734

as you can see quite a few over the legal limit.where would you guys say my sweet spot is in there.cheers

OK - You should worry about sweet spot after you have sorted out the 'hot' status of your rifle. I am very tempted to help you by tuning and re-setting the rifle myself but if it is brand new as you say (and you have proof of purchase + receipt), there is no reason why any self-respecting RFD will not do the needful for you. That way, if anything else should go wrong in the next 12 months, you would still have an intact warranty.
You could face a stiff set of penalties ... perhaps worst of all losing the ability to keep rifles if your get checked while going hunting etc. If you only shoot targets in a club, even they will stop you so best get this fixed.
Let us know how you got on.

Oh ... and before you do anything, what pellets are these readings with? Any overstatement error in the pellet weight input into the formula can obviously make your rifle seem over the limit. You would be trying to fix something that probably isnt broken.

Hi the pellets I used are jsb exact diablo 8,44 gr.s9 should I take it back to the shop and tell them to sort it.also it's a pain coz it's hard to get good groupings with it coz it's very erratic most of the time.thanks

Yes, it is best to let the seller sort this out if you value the warranty. Reducing the power may also bring an improvement in consistency.

Oh and I appreciate your offer to help tune the rifle,I've seen many of your posts and you seem to know your stuff.id be quite happy for you to tune the rifle instead of the shop as you seem more knowledgeable than them ha.its just annoying that you by a new rifle and don't except it to be firing over the legal limit you know.

Check/replace batteries on chrono too. You can get erratic readings.

Hi mate yeh I put new batteries in funnily enough before testing.im thinking of getting a reg put in anyway as I would like consistent shots without the erratic power fluctuations,what do you guys think cheers

Hi,

Firstly here is the graph:-



I think your chrono is misreading as you almost have two curves on the one graph. Also some of the readings are nearly 100 fps apart which I find hard to believe. If it's a combro you are using to measure velocity try repositioning it slightly. I have seen the above effect on my own rifles with a combro especially with .177 which is more position sensitive than the larger .22

Mark

Hi yes it is a combro I'm using I will test again tommorow and reposition it.thing is I done the test twice and more or less the same results??when I'm shooting at 30 meters the poi is sometimes half an inch up from my zero and then a couple of shots bang on zero and then fly up again??strange one,anyway thanks for the advice I'll run the test again tommorow cheers

Like Mark112 says, you have 2 very nice curves in that graph.
Are they all shot from the same tin of pellets? It's like you have a mixture of light & heavy pellets.