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Power Curves Effecting POI


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my Air Ranger is has a sweet spot at around 150Bar, its top up level is 180Bar. the gun shoots ok when topped up but when you get it down to the 150 mark its totaly bang on power wise and accuracy wise with maximum consistancy. also noticed when the gun starts to drop off power around 110Bar its POI changes quiet quickly with not only a drop in power the gun starts to shoot consistantly left slightly? when I top it back up its bang on zero again...

 

Confused is a understatement as I would have thought a power drop would consiquently change the POI to hit lower?

 

I'm also confused why Manufacturers quote a optimum charge limit on the guns yet the gun doesn't come into its own until a good few bar lower :hmm:....

 

Hope someone can make sense of this for me :laugh:...

 

Jasp

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Answered your own question Jasp , it's the power curve .

 

Get a rugged gun , it'll never happen , Bust

 

does it mean its normal for it to stick them over to the left or right Bust? I can understand a drop off but boy this sends them a good 8 clicks over to one side...

 

I take you mean a springer Buster? must say mate I am considering going for a Pro Sport or have been meaning in the past having this gun regulated, not sure if it would help but it sounds good :D:thumbs:.

 

Jasp

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Sorry Jasp, I mean regulated . The thing about a reg is all shots are the same , so there's no power curve. As for the left thing , it may just be 'the way it is ' , or if it bothers you give the barrel a clean .

My last gun was regged , and this one is . No worries of learning the curve , and max shots , can't be bad .

Edited by Buster321c
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think regulating sounds like the answer to all my problems Buster :thumbs:. Read a bit on the simon howarth Tench converstions on the BSA guns but not heard of anyone having a Air Ranger done as yet? probably a good idea to speak to the guy and see what he says......

 

Jasp

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my Air Ranger is has a sweet spot at around 150Bar, its top up level is 180Bar. the gun shoots ok when topped up but when you get it down to the 150 mark its totaly bang on power wise and accuracy wise with maximum consistancy. also noticed when the gun starts to drop off power around 110Bar its POI changes quiet quickly with not only a drop in power the gun starts to shoot consistantly left slightly? when I top it back up its bang on zero again...

 

Confused is a understatement as I would have thought a power drop would consiquently change the POI to hit lower?

 

I'm also confused why Manufacturers quote a optimum charge limit on the guns yet the gun doesn't come into its own until a good few bar lower :hmm:....

 

Hope someone can make sense of this for me :laugh:...

 

Jasp

Just a thought but could it be that you say you notice a drop in power at the same time it starts shooting to the left. If there is less power the pellet will be traveling slower and therefore in the barrel fractionally longer. When you pull the trigger there is naturally a slight movement of the gun sideways. If the pellet is leaving the gun at the same time then the slight sidways movement of your body would result in the same point of impact, that which you would have your scope centered on. If the speed it leaves the barrel varies so will the piont of impact.
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