My AA S410 Xtra kick’in out 61 ft/lbs with 21gr Kodiak!!!!
61 ft/lb with Beeman Kodiak 21.1gr pellets…. 8)
Start fill 2700psi – finished just under 1800psi after 30 shots.
40 shot string:
Full Power
01 – 1100
02 – 1118
03 – 1127
04 – 1137
05 – 1139
06 – 1139
07 – 1134
08 – 1135
09 – 1148
10 – 1151
Average 1133 fps @ 60 ft/lb
11 – 1147
12 – 1150
13 – 1145
14 – 1150
15 – 1141
16 – 1144
17 – 1139
18 – 1134
19 – 1134
20 – 1135
Average 1142 fps @ 61 ft/lb
21 – 843 ❓
22 – 818 ❓
23 – 1109
24 – 1109
25 – 1100
26 – 1092
27 – 1094
28 – 1087
29 – 1035
30 – 1035
Average 1032 fps @ 50 ft/lb
31 – 1027
32 – 798 ❓
33 – 793 ❓
34 – 789 ❓
35 – 785 ❓
36 – 776 ❓
37 – 1017
38 – 1010
39 – 1000
40 – 955
Average 895 fps @38 ft/lb 😥
10 shot string:
Start 2700psi – finished @around 2400psi
Full Power
01 – 1057
02 – 1070
03 – 1077
04 – 1084
05 – 1087
06 – 1091
07 – 1091
08 – 1093
09 – 1095
10 – 1095
Average 1084 fps 55 ft/lb
I tested the average fps at full power for the CPHP 14.3gr @ 1291fps and the JSB 15.9gr pellets @ 1203fps
As for the ❓ … I think I know what it is so I’m going to continue with the fine adjustments to have it function nice and smooth.
Now it’s time to dial it down abit and keep it under 1000fps for the accuracy.
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I changed mine once, then accidentally ruined the innards of my shroud so I made one of my own.
Crummy picture, but tube is .75″ID Carbon, bonded to a 1.25″ ID sleeve that takes the place of the barrel band.

Innards are glued in so I cant show it, did not take any pictures before assembly. Looks a lot like a Blodnob core though. The pics were taken before I finished it up so the glue bead is ugly. Ive built another with matching weave as I didnt have open access to the materials for the first one but Ive never bothered to put it together.

Sweet looking rifle riffraff! Did you paint that stock???