TargetTalk

I hand jump my LP 10 cylinder, and I try to squeeze out as many shots as I can between refill.

I usually shoot between bottom of red zone, down to middle of yellow zone.

Is there any accuracy difference those two zones? Are the pellets gradually dropping between those two zones, and I am clicking my elevation Up/Down knob as a result of it? And when I refill up to bottom of red zone, I am initially shooting high again?

miacdc wrote:I hand jump my LP 10 cylinder, and I try to squeeze out as many shots as I can between refill.

I usually shoot between bottom of red zone, down to middle of yellow zone.

Is there any accuracy difference those two zones? Are the pellets gradually dropping between those two zones, and I am clicking my elevation Up/Down knob as a result of it? And when I refill up to bottom of red zone, I am initially shooting high again?

It's possible, but I think unlikely. My LP10 only drops low right at the very end of the yellow. You can either try chrono'ing the gun at the start and end to see, or more practically stay in the green all the time. It will not vary in the green (unless your gun is faulty).

Rob.

You do realize that by shooting more from the cylinder you also have to pump more to refill it back up. Directly proportional too =)

it's possible that velocity remains constant. But if it bothers you, if you feel unsure, then it will affect your shooting.

I'd just pump every time it drops off green and not worry. my 2 cents. =)

miacdc wrote:I hand jump my LP 10 cylinder, and I try to squeeze out as many shots as I can between refill.

I usually shoot between bottom of red zone, down to middle of yellow zone.

Is there any accuracy difference those two zones?

Yes, and even worse: pellet velocity from MY one year old LP 10 starts to slow down when the pressure gauge is 3/4 down in the GREEN zone! Point of impact changes gradually and signifacantly too, from this pressure level.

Check your own LP 10guns with a chronogaph, and bring the results here, please.

GHB wrote:Yes, and even worse: pellet velocity from MY one year old LP 10 starts to slow down when the pressure gauge is 3/4 down in the GREEN zone! Point of impact changes gradually and signifacantly too, from this pressure level.

Check your own LP 10guns with a chronogaph, and bring the results here, please.

Wouldn't that indicate a faulty regulator. What are your chronograph readings.

David Levene wrote:

GHB wrote:Yes, and even worse: pellet velocity from MY one year old LP 10 starts to slow down when the pressure gauge is 3/4 down in the GREEN zone! Point of impact changes gradually and signifacantly too, from this pressure level.

Check your own LP 10guns with a chronogaph, and bring the results here, please.

Wouldn't that indicate a faulty regulator. What are your chronograph readings.

Exactly, it most deffinately should not do that, the regulator should be keeping it constant, if it isn't then the gun needs repairing.

Rob.

RobStubbs wrote:
Wouldn't that indicate a faulty regulator?

Exactly, it most deffinately should not do that, the regulator should be keeping it constant, if it isn't then the gun needs repairing.

Rob.

The gun is new. A new Steyr doesn't need no repair.
The decline in pellet velocity is caused by regulator cut-off.

GHB. wrote:The gun is new. A new Steyr doesn't need no repair.

You are joking, right? Even new guns go wrong sometimes; that's why they come with a warranty. At one year old they could succumb to any of the faults of older guns.

GHB. wrote:The decline in pellet velocity is caused by regulator cut-off.

Which is why I am suggesting a faulty regulator. The only other reason I can think of for a drop in velocity while still in the green zone is a faulty cylinder gauge, but that should become clear if you use another cylinder.

The regulator is there to provide a consistant pressure to the pellet, resulting in a consistent velocity, whenever the pressure in the cylinder is within the useable pressure range (indicated by the gauge). If it is not doing that then there is something wrong.

David Levene wrote:

GHB. wrote:The decline in pellet velocity is caused by regulator cut-off.

Which is why I am suggesting a faulty regulator. The only other reason I can think of for a drop in velocity while still in the green zone is a faulty cylinder gauge,


The regulator is there to provide a consistant pressure to the pellet, resulting in a consistent velocity,...If it is not doing that then there is something wrong.

No.
The Steyr barrel is vented, and the gun has an CA-driven "absorber"
To attain a given muzzle velocity there must be a sertain pressure level in teh cylinder. If the pressure is to low, then the gun is unable of attaining the desired MV.
Set at an MV of 155 m/s the minimum pressure in my gun is well into the green zone.
So, I disagree with you.
If anything is not working right it rather has to be an o-ring leaking slightly.

GHB, wrote:So, I disagree with you.

You wouldn't be the first, and I'm sure you won't be the last.

It doesn't matter; if you're happy with a gun that won't use all of the indicated air in the cylinder then that's fine.