Cartridge is from Ammo Manufacture: Underwood 357 Sig 125gr Gold Dot Bonded (supplied by chris2000ss Feb 2019)
Ballistics Information: 357 SIG
Muzzle Velocity: 1475 fps
Muzzle Energy: 604 ft. lbs
Brass Make/Headstamp: Starline – Nickel
Bullet Make/Weight/Construction/Info; Length 0.5270"/Dia. 0.3550": Speer 125gr. GDHP
HP depth 0.1125" / HP dia 0.2080" tapered / HP outside 0.2650"
Actual weight 123.2 / 125.0 grains (concave base)
C.O.A.L.: 1.1220" / 1.1295" crimp groove dia: 0.3535"
Primer: Small Pistol Nickel color
Case: Diameter 0.4215" Crimp Diameter 0.3780" (medium) Length 0.8585"
Powder Description/Positive ID/Type/Charge Weight: Accurate #7 12.2 / 12.2 grains
Western Powder shows 124 gr HDY FMJ FP max as 11.0 grains 1320 fps 37,100 PSI
(https://i.postimg.cc/X7tj1JrC/IMG-0569.jpg)
(https://i.postimg.cc/bv9qv93x/IMG-0570.jpg)
(https://i.postimg.cc/xd20Y4yj/IMG-0571.jpg)
(https://i.postimg.cc/636t44mD/IMG-0573.jpg)
(https://i.postimg.cc/vZ9QJsnS/IMG-0574.jpg)
(https://i.postimg.cc/76BD3Yvb/IMG-0572.jpg)
Nice job shadow ! 8)