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All Springer/NP/PCP Air Gun Discussion General > PCP/CO2/HPA Air Gun Gates "The Darkside"

Beeman 2027.flattening the shot curve

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James340:
I wanted to get 550/600 fps.I started at 2200 psi and it was shooting 300 with the hammer spring adjusted 7 turns in from flush but velocity steadily went up as pressure went down.it hit 600 at around 1800 psi.I did some HS adjustments and different psi.I get 578 fps to 630 fps at a start pressure of 1200 psi and ending 800 psi and HS adjuster flush with receiver.I wonder if a lighter poppet/valve spring would help to flatten the curve.

Robert 5mm:
I started at 3000 psi ( I have a compressor ) and here is my 2027 chrono results.
I forget what HS settings other than I was trying for two mags or 24 shots.

James340:

--- Quote from: Robert 5mm on February 04, 2023, 09:55:00 PM ---I started at 3000 psi ( I have a compressor ) and here is my 2027 chrono results.
I forget what HS settings other than I was trying for two mags or 24 shots.

--- End quote ---
I am after 550/600 fps.More velocity is very loud and unnecessary for my plinking.

Robert 5mm:
I use a Buck Rail 1322 moderator - it is neighbor friendly

James340:

--- Quote from: Robert 5mm on February 04, 2023, 10:26:33 PM ---I use a Buck Rail 1322 moderator - it is neighbor friendly

--- End quote ---
I will continue to test/play with HS adjustments and see what happens.I thought someone may have worked on poppet tuning with springs.

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