Help me finding Sweet Spot of my Daystate Regal XL .22

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teeken

teeken

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Jan 26, 2017
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With my CE ProChrono Digital, it was time to find the sweet spot of my latest PCP Regal XL .22 (30 FPE Version)
I was filling to maximum recommended fill pressure 230 bar and firing about 55 shots using JSB Exact Jumbo Express (14.35 grains).
This is the shot string:
Shot FPS
1 856
2 862
3 855
4 865
5 866
6 872
7 866
8 871
9 872
10 872
11 876
12 880
13 888
14 883
15 879
16 886
17 885
18 886
19 890
20 895
21 895
22 896
23 893
24 897
25 896
26 896
27 895
28 899
29 900
30 897
31 903
32 900
33 903
34 899
35 897
36 896
37 894
38 895
39 897
40 896
41 888
42 890
43 891
44 884
45 883
46 880
47 880
48 875
49 868
50 868
51 862
52 861
53 857
54 855
55 855

This is the chart:
http://i976.photobucket.com/albums/ae250/kennydongnguyen/PCP%20Air%20Rifle/DaystateRegalXL22_JSB1435_zps5rtsu4hd.png

I'm really new to PCP, so may you guys please help me finding Sweet Spot for my PCP.

Thanks
 
Sorry about that, Started off at 200 BAR ran it down into the start of the red on the gauge. 70 degrees F, light wind. Punched right thru 7/8" OSB and 1/2" Decking, but not thru the 50 lb sack of Cypress Mulch backstop.

This gun shoots so good and I am extremely happy with it ! Love it so much just had to go digital and ordered an AW from AOA ! (Thank goodness for separate credit cards !)
 
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"Regal_US"Are you sure 230 is the recommended fill pressure? On most Regal XLs its 210 bar (indicated by a round decal with the text SWP and the value below that). If you fill to a higher pressure you do get more shots per fill, but your shot curve will have a stronger bell shape, which yours seems to have.
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I'm not sure about that the recommended fill pressure is 230 or 210. I saw that number (230) on the tag which comes with my daystate regal ... is that maximum or recommended fill pressure ?

I should fill up 230 bar again, shoot out 11 shots and check pressure .... so I will know how many bar at #12 shot???
 
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"teeken"
"Menttaliist"I would choose from 12 all the way to shot 47 (like Marksman3006 recomend you). Start shooting through the chrono, and just check the pressure once you see the first shot at 880fps and then recheck it once it's at 880fps again
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Great idea bro ... I will ;))
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That should give you a more precise result than checking it every 10 shots. Good luck
 
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I've ran my new Huntsman Regal. 22 through the chrony using 200, 210, 220, and 230 BAR fills with my Hill MK4 pump. I've only tested JSB 18.13gr and 15.89gr Exacts so far trying to find the sweet spot. The SWP decal states 220 BAR but like everyone here is recommending, it's best to fill to 210 BAR. At a 210 BAR fill, the results are less ES and SD. I entered my shot strings in my mobile Excel app for reference. I'm not too sure if you can see the numbers but here it goes...

 
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"Peskadot671"I've ran my new Huntsman Regal. 22 through the chrony using 200, 210, 220, and 230 BAR fills with my Hill MK4 pump. I've only tested JSB 18.13gr and 15.89gr Exacts so far trying to find the sweet spot. The SWP decal states 220 BAR but like everyone here is recommending, it's best to fill to 210 BAR. At a 210 BAR fill, the results are less ES and SD. I entered my shot strings in my mobile Excel app for reference. I'm not too sure if you can see the numbers but here it goes...

Click to expand...
As I mentioned, I received my JSB 15.89 and 18.13 yesterday afternoon from Pyramidair. Before I went to work, I filled my Regal up to 200bar (due to the sweet spot) and took a couple of shots using JSB 14.35, 15.89 and 18.13 (5shots/each at 25 yards)

In the picture: 14.35 (top), 15.89 (mid) and 18.13 (bottom)



JSB 15.89 is better than 13.45 and 18.13 is the best so far ... However, I think that 5 shots at 25 yards is not enough to make sure which pellet is the best for my Regal, so I will run more test this weeken to find out 

Thanks @Peskado671 for a detail tested on JSB 18.13 and 15.89 which I'm gonna use for my Regal ;) Your test is really help. Btw, Which one is good for your Regal?.

 
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If I can my 2 cents to the very good advice so far:

Assuming you haven't done this or a similar test I've found it very helpful with non-regulated airguns:

Using a pellet that shoots hole on hole groups at a range close enough to take out as much human error as possible, say 25-30yds, and a large piece of paper. 
Draw a line a couple of feet long on the paper and set it at the close range so that the line is horizontal. 
Make a note of the starting pressure at the left end of the line.
Aiming at the left end of the line take your first shot, move along 1/2" and shoot again, continue this for 10 shots.
Check pressure and mark it on the target at the point of shot 10.
Continue shooting and marking every 10 shots.

When you finish, you should have a nice representation of your bell curve in the way the line of pellet holes will start under the line (or wherever it is hitting acoording to your zero) then creep up and plateau before dropping down again. This combined with your pressure markings should give a clear indication of where in terms of fill pressure your most consistent shots will be.
 
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