Cartridge is from Ammo Manufacture: Winchester USA 165gr. FMJ
Muzzle Velocity; Advertised: 1060 fps
Actual Instrumental Velocity: 1026 fps – 24 fps ES Shot from a S&W Sigma 40F
Muzzle Energy; Advertised: 412 ft. lbs.
Brass Make/Head stamp: Winchester 40 S&W
Bullet Make/Weight/Construction/Info: Winchester 165gr FMJ; .3995" dia; .542" long
Actual Weight: 164.9 grs.
Crimp diameter: .4198"
C.O.A.L.: 1.112"
Primer: Winchester brass color
Case: Brass
Powder Description/Positive ID/Type/Charge Weight: Med flake; 6.0grs.
Target shot at 25 yards. Circle 5½"
(https://i.postimg.cc/br7GR9HT/DSC01757-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/T2FWGTMD/DSC01758-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/dVm78d72/DSC01759-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/4xT77w34/DSCN7760-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/3JG0xzYb/DSC01749-resized.jpg) (https://postimg.cc/crsLD9KQ)
The powder looks like LongShot and at 6.0 grains @ 1026 it may be.