Survey please help Fills shots and refill at pressure.

[jeff1983]

1. Model - Marauder

2. Caliber - .22

3. Start fill pressure - 2,800 PSI

4. 30 shots before refill

5. Ending PSI - 2,000

Shoots Beeman Kodiaks and H&N Barracuda Match 21.1 g pellets at avg 825 fps, and JSB Diablo Exact Jumbo Heavy 18.1 g pellets at avg 865 fps.

Spring - 7 turns cw
Hammer - .5 turn cw
Port - 4.0 turns open

[ThTx]

This one is kinda long, but it is all the info I have so far. I am going to try a couple different pellets, but with the numbers I'm getting here, they will have to really perform to make me change.

.22 Marauder

2700psi fill

Pellet - 16 g Predator Polymag

String #1

786.13
788.13
792.41
792.47
794.34
794.60
796.53
798.48
794.86
789.98

792.79 AVG
12.35 Extreme Spread
3.60 Standard Deviation
22.29 FPE Avg Energy
End Pressure – 2600

String #2

801.54
800.43
803.03
802.87
802.93
804.37
807.05
813.23
808.45
808.07

805.19 AVG
12.80 Extreme Spread
4.00 Standard Deviation
23.03 FPE Avg Energy
End Pressure 2400

String #3

807.64
810.40
812.03
820.89
815.36
818.12
813.67
812.85
816.96
815.15

814.30 AVG
13.25 Extreme Spread
3.74 Standard Deviation
23.56 FPE Avg Energy
End Pressure 2200

String #4

793.82
816.74
812.03
812.96
810.18
809.96
811.16
804.95
799.11
799.80

807.07 AVG
22.92 Extreme Spread
7.34 Standard Deviation
23.14 FPE Avg Energy
End Pressure 2000

String #5

797.95
797.32
793.61
789.26
789.98
780.76
784.96
779.40
774.57
771.11

7885.89 AVG
26.84 Extreme Spread
9.16 Standard Deviation
21.94 FPE Avg Energy
End Pressure 1700

Refill to 2700
Pellet - Crosman Premier 14.1 g (in the box)

String #1

828.20
837.54
836.49
837.54
848.22
841.79
844.55
846.38
848.69
846.02

841.54 AVG
20.49 Extreme Spread
6.48 Standard Deviation
22.17 FPE Avg Energy
End Pressure 2500

String #2

852.10
853.48
852.40
854.38
855.17
852.22
855.23
852.64
852.40
855.23

853.52 AVG
3.13 Extreme Spread
1.41 Standard Deviation
22.81 FPE Avg Energy
End Pressure 2300

String #3

855.95
853.48
852.94
855.65
848.16
852.04
850.12
848.22
848.34
845.20

851.01 AVG
10.75 Extreme Spread
22.68 FPE Avg Energy
End Pressure 2150

String #4

845.61
837.01
834.71
834.65
830.81
826.44
825.60
821.17
818.29
815.04

828.93 AVG
30.57 Extreme Spread
9.27 Standard Deviation
21.51 FPE Avg Energy


I still love this gun!

[havoc]

.25 Marauder

fill to 3200psi

24 shots end pressure 2000psi

This is with Jsb pellets averaging 890fps

[rdm]

I am working on another fill calc spreadsheet and I need some feedback . I am sure others will find this information useful as well.

Could you please reply to this post with:
1. Gun Model
2. Caliber (.177, .22, .25, ??)
3. Fill Pressure (ie 2800 psi)
4. Typical number of shots taken before a refill
5. What is the ending pressure in the gun. If you closely watch the gauge when you refill the gun the needle moves fast then stops or slows for a second when the pressure in the hose equals the pressure remaining in the tank.

Thanks

Roger

1. Gun Model
.22 Marauder rifle
.22 Marauder pistol (carbine use only)
.22 Remington NPSS (break barrel not PCP)
2. Caliber (.177, .22, .25, ??)
.22
3. Fill Pressure (ie 2800 psi)
2500 psi factory tuning
4. Typical number of shots taken before a refill
Careful shooting
.22 Marauder rifle factory tune
30 shots per fill
.22 Marauder pistol (carbine use only)
20 shots per fill
Fun shooting
.22 Marauder rifle factory tune
50 shots per fill
.22 Marauder pistol (carbine use only)
30 shots per fill

5. What is the ending pressure in the gun. If you closely watch the gauge when you refill the gun the needle moves fast then stops or slows for a second when the pressure in the hose equals the pressure remaining in the tank.
Careful shooting
2450 psi to 1950 psi
Fun shooting
2550 psi to 1600 psi

[bowman]

.25 cal @ 3200 psi fill I get 24 shots = 3 clips down to 2200 psi .AWSOME ACCURACY!!! Holy cow this thing hits hard I love shooting my M-ROD 25 so much. 1000 rounds of JSB KINGS in a month so far Still as accurate as the day i got it.I want to go shoot now ,by by.

[sacshooter]

Thanks,
Roger

[AirRifleHunter]

Marauder
.22 Cal
Start Pressure 2700
30 shots
Ending Pressure 1800

Using Crosman Premier Hollow Points, 14.3 grain. Average first clip velocity 910 FPS. Average second clip velocity 890 FPS. Average third clip velocity 870 FPS or so. Could possibly do a fourth clip, but velocity would really start to drop off quickly and it would take longer to refill.