For those with the fx power plenum

For those who shoot jsb 18gr, it is not at all necessary to buy a power plenum.

Click to expand...

Rather it becomes counterproductive for 18 grain .22 pellets as far as accuracy is concerned

Click to expand...

Why is that?

Click to expand...

I think Umair is missing the fact you can run at a way lower reg pressure. I bet 100bar reg would send the 18s 900-1000. With a different big plenum i can get the 34gr heavies in .25 at 1000 if wanted at 100 on the reg.

Click to expand...

In fact when I have to tune an Impact for extreme accuracy at long ranges, there are many combinations of HST, valve and regulator pressure that provide similar fps with a certain grain ofpellets.

At that certain fps allcombinations are not equally accurate. 

Swift and quick Pulse of air and longer but slower pulse of air make changes in accuracy of same pellets. 

When I talk about extreme accuracy I do not mean achieving hunting accuracy or a certain fps.

I prefer removing bigger plenum when I make best combination for extreme accuracy with 18 grain .22 pellets. 

Regards ,

Umair Bhaur 

For those who shoot jsb 18gr, it is not at all necessary to buy a power plenum.

Click to expand...

Rather it becomes counterproductive for 18 grain .22 pellets as far as accuracy is concerned

Click to expand...

Why is that?

Click to expand...

I think Umair is missing the fact you can run at a way lower reg pressure. I bet 100bar reg would send the 18s 900-1000. With a different big plenum i can get the 34gr heavies in .25 at 1000 if wanted at 100 on the reg.

Click to expand...

In fact when I have to tune an Impact for extreme accuracy at long ranges, there are many combinations of HST, valve and regulator pressure that provide similar fps with a certain grain ofpellets.

At that certain fps allcombinations are not equally accurate. 

Swift and quick Pulse of air and longer but slower pulse of air make changes in accuracy of same pellets. 

When I talk about extreme accuracy I do not mean achieving hunting accuracy or a certain fps.

I prefer removing bigger plenum when I make best combination for extreme accuracy with 18 grain .22 pellets. 

Regards ,

Umair Bhaur

Click to expand...

Yeah i understand now

What's the hammer weight difference of the original and new PP hammer with it new add spring guide weight?

Use the original hammer spring.

For those who shoot jsb 18gr, it is not at all necessary to buy a power plenum.

Click to expand...

Rather it becomes counterproductive for 18 grain .22 pellets as far as accuracy is concerned

Click to expand...

Why is that?

Click to expand...

I think Umair is missing the fact you can run at a way lower reg pressure. I bet 100bar reg would send the 18s 900-1000. With a different big plenum i can get the 34gr heavies in .25 at 1000 if wanted at 100 on the reg.

Click to expand...

In fact when I have to tune an Impact for extreme accuracy at long ranges, there are many combinations of HST, valve and regulator pressure that provide similar fps with a certain grain ofpellets.

At that certain fps allcombinations are not equally accurate. 

Swift and quick Pulse of air and longer but slower pulse of air make changes in accuracy of same pellets. 

When I talk about extreme accuracy I do not mean achieving hunting accuracy or a certain fps.

I prefer removing bigger plenum when I make best combination for extreme accuracy with 18 grain .22 pellets. 

Regards ,

Umair Bhaur

Click to expand...

I second this statement.