(https://i.postimg.cc/j5jVtGBv/DSC02735-sized.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: Winchester .357 Mag
Muzzle Velocity; Advertised: 1450 fps
Muzzle Energy; Advertised: 583 ft/lbs
Actual Instrumental Velocity: 1366 fps; 4" 686; 44°F
Target dot 4"
(https://i.postimg.cc/Wp9vP83p/DSC02781-sized.jpg) (https://postimg.cc/23BJQ4hg)
Brass Make/Headstamp: Winchester 357 MAG
Bullet Make/Weight/Construction/Info: Winchester 125gr JHP; .3567" dia; .545" long.
Actual Weight: 124.4grs.
(https://i.postimg.cc/28ZskdXp/DSC02740-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/JzT5zwjd/DSC02791-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/cJrMKDm1/DSC02792-sized.jpg) (https://postimages.org/)
C.O.A.L.: 1.563"
Primer: Brass color; Winchester WSPM
Case: Nickel
Powder Description/Positive ID/Type/Charge Weight: Flattened Ball; 19.8grs.
(https://i.postimg.cc/pV4NMcCY/DSC02738-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/rw2vKdvD/DSC02736-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/ht8NxDBp/DSC02739-sized.jpg) (https://postimages.org/)
I got one low reading on the chrono. The average should be a bit higher had this not occurred. The bad round went low and right.
After seeing 19.5grs of a ball powder in this ammo, I loaded up some Winchester 125gr JHP, 19.8grs of 296 and a Fed 200 primer. I only got 1167 fps out of the 4" 686. This was shot right after testing this Winchester ammo. Same day, close to the same temperature.
(https://i.postimg.cc/R0xJ94FB/125gr-Win-JHP-1-31-19-19-8gr-296.jpg) (https://postimages.org/)
Shot another group today, 2-6-19.. Not much difference in Sd, but better.. Velocity reflects a colder day.
(https://i.postimg.cc/nhk15Ykm/2-6-19.jpg) (https://postimg.cc/9DDTw9sX)
Shot another group today.. See original post.