MARAUDER factory settings have been changed = (RESULTS)

[kp4att]

MARAUDER .177 FACTORY SETTINGS HAVE BEEN CHANGED

Factory setting: 40 SHOTS (HEAVY 10.5 g (crosman premier)
Starting: 2500 psi
Ending:  2,000 psi

10 SHOTS: (ONLY -  VALVE METERING SCREW – (FULLY OPEN ‘ COUNTER CLOCKWISE):

872-861-870-879-870-924-886-882-887-885

Lo = 861.6 fps
Hi = 887.0 fps
Av = 880.7 fps
Es = 62.99
Sd = 17.02


The MARAUDER .177, now…TUNED for 30 shots:  HEAVY 10.5 g (crosman premier)
Starting: 3000 psi
Ending:  2,100 psi

Chrony:
1.   964.4
2.   961.0
3.   968.0
4.   969.0
5.   964.5
6.   966.5
7.   944.7
8.   940.7
9.   939.3
10.   954.7
11.   948.2
12.   945.8
13.   943.7
14.   947.1
15.   949.9
16.   944.5
17.   937.2
18.   941.7
19.   942.9
20.   935.9
21.   938.5
22.   933.0
23.   931.4
24.   927.7
25.   929.0
26.   925.2
27.   924.3
28.   915.3
29.   915.6
30.   911.5

Lo = 911.5 fps
Hi = 968.8 fps
Av = 941.8 fps
Es = 26.5
Sd = 15.52


I WILL BE PRACTICING SHOTS from 50 to125 yards  (SNIPER SHOTS)  -  2 inches targets … YES!!!

SCOPE: Centerpoint Power Class 8-32 X 56mm - ZERO 23 yards


First fast practice – before the RAIN began…

Front portion of the rifle supported - sitting position:

1st shot – Tree leaf flat portion - 50 yards without any a scope change other than PA.: 1 inch lower
2nd shot – Tree leaf flat portion - 61 yards without any a scope change other than PA.: ½ inch lower
3rd shot -- Tree leaf flat portion - 64 yards without any a scope change other than PA.: ½ inch lower

@Always sighting to the center reticule dot.

NO BAD FOR A BEGGINER....and...................... THANKS everybody for the help for do these changes!!!!

/ GERALD

[spysir]

Now have just a little more fun adjusting ? ? ? .  Your numbers look nice but I believe with just a bit more tinkering they will be much better.
You dont have a bell curve going, you could OVER fill ( not recomended) untill you get to say 950 starting then climbing to 960-970 then back to 950 but as you have all the choice of adjustment on that rig who knows  (and we thank you in advance for this and the next report) mabye back off the hammer spring pressure slightly? Perhaps shortening the hammer run ? That one might make slightly lower number but closer from start to finish? Naturally one thing at a time.
 Saw in your signature line you have a custom RWS48 and just though I would put in a picture ( 2 ?) of my To1 RWS48/52
 
it's the one in the left hand Ash stock
and a little jeweling on the comp. chamber:

the stock used to look like this:

and another piece of the Ash:

 Keep us posted.

 John

[kiwi]

spysir - 12/19/2009  11:15 AM

Now have just a little more fun adjusting ? ? ? .  Your numbers look nice but I believe with just a bit more tinkering they will be much better.
You dont have a bell curve going, you could OVER fill ( not recomended) untill you get to say 950 starting then climbing to 960-970 then back to 950 but as you have all the choice of adjustment on that rig who knows  (and we thank you in advance for this and the next report) mabye back off the hammer spring pressure slightly? Perhaps shortening the hammer run ? That one might make slightly lower number but closer from start to finish? Naturally one thing at a time.
 Saw in your signature line you have a custom RWS48 and just though I would put in a picture ( 2 ?) of my To1 RWS48/52
 
it's the one in the left hand Ash stock
and a little jeweling on the comp. chamber:

the stock used to look like this:

and another piece of the Ash:

 Keep us posted.

 John

Hey sport those 2 stocks are easly the nicest I have seen.....
that takes skill way beyond  joe avarage......

PETE

[kp4att]

WHY THE BELL CURVE???/   because one of my setting that I have the chrony numbers

numbers started from 869.. and started to increase until 962.3 and fall 873.... I did with that fill 40 shots until 2100 psi.

the ES = 212.2 and the Sd = 41.02

I thought this settin was wrong.


I thought that the ES = should be lower .... I move the rifle few times of position...

The numbers with a curve like are the correct pattern that a PCP should be shooting???


and the RWS 48, I just modified the stock, a little the design and I removed the black coat from the barrel and from the side
level  and shine them until the chrome.  

NEW STAIN MIX and 10 coats of Polyurethane for a cristal clear shinny coat.

/ GERALD

[kp4att]

I will try tomorrow to see if I can get chrony number with a curve compleatly over 900 fps and 30 shoot.... Let see what the rifle can do now!! / GERALD

[spysir]

I happen to like shine on an airgun ,  nice 48.

 Dont get me wrong your pcp numbers are good, and I dont own that model but I do think you will improve your numbers even more in the near future. And you do have the "new" marauder trigger right? Have you thought about tweaking that into a fine match trigger?

 John

[kp4att]

I JUST CHANGE THE TRIGGER PRESSURE. I DO NOT KNOW HOW MANY POUNDS BUT IT IS SOFT TO PRESS!!!  / GERALD