(https://i.postimg.cc/tgWFBpTr/DSC02572-sized.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: Winchester 357 Mag
Muzzle Velocity; Advertised: 1290 fps
Actual Instrumental Velocity: 1156 fps 4" barrel 39°F
Muzzle Energy; Advertised: 536 ft/lbs
4" target circle.
(https://i.postimg.cc/cLqHXYnS/DSC02597-4-sized.jpg) (https://postimages.org/)
Brass Make/Headstamp: Winchester 357 MAG
Bullet Make/Weight/Contruction/Info: Winchester SilverTip 145grs. JHP .3556" dia. .659" long
Actual Weight: 145grs.
(https://i.postimg.cc/T3WbPfrR/DSC02599-sized.jpg) (https://postimages.org/)
Crimp diameter:
C.O.A.L.: 1.576"
Primer: WSPM brass color
Case: Nickel 1.280" long. 83.1grs w/primer
(https://i.postimg.cc/XvfywLHm/DSC02581-sized.jpg) (https://postimages.org/)
Powder Description/Positive ID/Type/Charge Weight: Flattened Ball; 16.5grs; H-110/296
(https://i.postimg.cc/vmFVgkz5/DSC02598-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/bv9sGJdj/DSC02574-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/76PbSkTJ/DSC02576-sized.jpg) (https://postimages.org/)
Note unusually small bullet diameter.
(https://i.postimg.cc/CLRBvSrj/DSC02578-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/dQHZmL6s/DSC02579-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/SRs2bhSb/DSC02580-sized.jpg) (https://postimages.org/)
Those look like they are a little light on the crimp for 296 powder... ::) The burn may be better with the heavier crimp and improve the velocity too.