Below is the string that I got using Crosman 14.2 gr HP pellets with CO2. Temperature outside was 72 degrees. This is after cutting 2.5 coils off the hammer spring to get more shots when using HPA, unfortunately I did not shoot a string using the stock spring and CO2. I am including the HPA string at the bottom just as an FYI. Hope this helps.
Bulk CO2 with 2.5 coils cut from hammer spring
# Vel Ft/lbs
1 653 13.4
2 662 13.8
3 662 13.8
4 656 13.6
5 657 13.6
6 657 13.6
7 653 13.4
8 654 13.5
9 653 13.4
10 654 13.5
11 653 13.4
12 650 13.3
13 649 13.3
14 642 13
15 643 13
16 653 13.4
17 651 13.4
18 653 13.4
19 649 13.3
20 647 13.2
21 647 13.2
22 644 13.1
23 635 12.7
24 629 12.5
25 639 12.9
26 639 12.9
27 647 13.2
28 645 13.1
29 646 13.2
30 644 13.1
31 641 13
32 640 12.9
33 639 12.9
34 637 12.8
35 635 12.7
36 637 12.8
37 635 12.7
38 632 12.6
39 631 12.6
40 623 12.2
41 636 12.8
42 633 12.6
43 630 12.5
44 630 12.5
45 630 12.5
46 630 12.5
47 628 12.4
48 625 12.3
49 620 12.1
50 614 11.9
51 615 11.9
52 615 11.9
53 608 11.7
54 601 11.4
55 601 11.4
56 594 11.1
57 591 11
58 585 10.8
59 578 10.5
60 570 10.2
61 562 10
62 552 9.6
63 542 9.3
64 527 8.8
HPA with 2.5 coils cut from hammer spring
# Vel
1 765
2 764
3 765
4 765
5 762
6 772
7 778
8 779
9 773
10 778
11 779
12 777
13 777
14 782
15 781
16 774
17 775
18 766
19 768
20 761
21 757
22 748
23 743
24 730
