Japanese Militaria at Castle-Thunder.com

[1886lebel]

Top: Siamese 8x50Rmm Type 45
Bottom: Siamese 8x52Rmm Type 66

Siamese 8x50Rmm Type 45
Original Cartridge:
Case Length ... 1.983 / 50.3682 mm
Overall Length ... 2.970 / 75.4380 mm
Rim Diameter: .560
Rim Thickness: .055
Base Diameter: .498
Neck Diameter: .348
Bullet Diameter: .321 ... 237 gr. round nose, lead cored, cupro-nickel clad, FMJ
FPS: 2050 MPS: 625

Woodleigh .323 220gr. Round Nose Soft Nose SD: .301 BC: .355 bullet ... (this was the closest to the original specs above)
Results:
IMR 4064 ... 42.0 grs. = 2050 fps
IMR 4320 ... 42.5 grs. = 2050 fps
IMR 4350 ... 47.7 grs. = 2050 fps
IMR 4831 ... 53.0 grs. = 2050 fps
IMR 4895 ... 41.0 grs. = 2050 fps
Case: Remington R-P / Reformed by Buffalo Arms
Primer: Winchester Large Rifle
Case Length: 1.980
Overall Length is 2.970


Siamese 8x52Rmm Type 66
Original Cartridge:
Case Length: 2.047 / 51.9938 mm
Overall Length: 2.941 / 74.70 mm
Rim Diameter: .560
Rim Thickness: .065
Base Diameter: .506
Neck Diameter: .348
Bullet Diameter: .321 ... 181gr. spitzer boat-tail bullet, lead cored, a gilding-metal or copper-washed steel FMJ jacket
FPS: 2250 / MPS: 685

Nosler .323 180 gr. Ballistic Tip SD: .246 BC: .357 bullet ... (this was the closest to the original specs above)
Results:
IMR 3031 ... 38.5 to 38.7 grs. = 2250 fps
IMR 4064 ... 40.5 to 40.7 grs. = 2250 fps
IMR 4320 ... 42.5 to 42.7 grs. = 2250 fps
IMR 4895 ... 42.3 to 42.5 grs. = 2250 fps
Case: Remington R-P / Reformed by Buffalo Arms
Primer: Winchester Large Rifle
Case Length: 2.037
Overall Length is 3.037