(https://i.postimg.cc/gJWzY37Y/DSC02894-sized.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: Remington UMC 158gr Lead RN
Muzzle Velocity; Advertised: 755 fps 4" barrel vented
Actual Instrumental Velocity: 4" barrel; 747 fps
5" barrel; 791 fps
Muzzle Energy; Advertised: 200 ft/lbs.
(https://i.postimg.cc/3JJ1DCd9/DSC02927-sized.jpg) (https://postimg.cc/nMgBymKQ)
Target circle 4"
Brass Make/Headstamp: R-P 38 SPL
Bullet Make/Weight/Construction/Info: Remington 158gr Lead RN
Actual Weight: Bullet #1; 158.5grs. Dia.; .3550-3558" Length; .720"
Bullet #2; 158.1grs. Dia.; .3487-.3493" Length .730"
(https://i.postimg.cc/Z5v4pftb/DSC02901-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/8kwpSJmS/DSC02898-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/zB8Nm8Lv/DSC02903-sized.jpg) (https://postimages.org/)
Crimp diameter: .374"
C.O.A.L.: 1.504 – 1.520"
Primer: Nickel Rem 1½
Case: Brass
Case #1; Wt. w/primer 70.0grs. Length 1.148"
Case #2; Wt. w/primer 69.0grs. Length 1.149"
(https://i.postimg.cc/3wM7BgYg/DSC02902-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/qMRkMJ1C/DSC02899-sized.jpg) (https://postimages.org/)
Powder Description/Positive ID/Type/Charge Weight: Small Flake.
Looks like Bullseye
Sample #1; 3.7grs.
Sample #2; 4.1grs.
(https://i.postimg.cc/90xCtKQM/DSC02896-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/5NRfXhrK/DSC02900-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/k5xChBgL/DSC02897-sized.jpg) (https://postimages.org/)
(https://i.postimg.cc/Kzf2xwLN/DSC02895-sized.jpg) (https://postimages.org/)
Some variation was found with C.O.L. in this box of ammunition.
Bullets were undersized and not very round, but they shot well.