(https://s20.postimg.cc/qo4leiye5/Fed_129gr_Hydroshok-crop.jpg) (https://postimages.org/)
(https://s20.postimg.cc/vo21m4ohp/DSC01623.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: Federal
Muzzle Velocity; Advertised: 950 fps
Actual Instrumental Velocity: 826 fps; 4" barrel; 53°F // 798 fps; 2½" barrel; 60°F
Muzzle Energy; Advertised: 258 ft. lbs.
Brass Make/Head stamp: Federal 38 Special +P
Bullet Make/Weight/Construction/Info: 129gr Hyrda-Shok JHP .3571" dia
Actual Weight: 128.7 grs.
C.O.A.L.: 1.407" - 1.408"
Primer: Fed
Case: Nickel
Powder Description/Positive ID/Type/Charge Weight: 5.9 grs. Small flake
(https://s20.postimg.cc/jkwpyxg3x/DSC01633.jpg) (https://postimages.org/)
(https://s20.postimg.cc/qo4lejt99/DSC01634.jpg) (https://postimages.org/)
(https://s20.postimg.cc/4oy6rb24d/DSC01637.jpg) (https://postimages.org/)
Here is how this ammo shot out of a 4" 686 at 25 yards;
(https://s20.postimg.cc/ez0lqkmv1/FED_Hydra-_Shok_129gr.jpg) (https://postimg.cc/image/5r8d9vfsp/)
Here is how this ammo shot out of a 2½" Model 66 at 15 yards;
(https://s20.postimg.cc/3zfeeyoq5/Fed_129gr_Hydroshok_2-half_inch.jpg) (https://postimages.org/)
Fixed the image codes The_Shadow
Looks like Power Pistol.