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Board index » Reloading and Ammo Topics » The 'Reloader' & Ammo Forum

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Siamese 8x50Rmm and 8x52Rmm reloading info

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1886lebel

Post subject: Siamese 8x50Rmm and 8x52Rmm reloading info

Posted: Mon Jan 21, 2008 4:34 pm

Lance Cpl

Joined: Mon Aug 06, 2007 11:44 pm
Posts: 47

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

I used the Woodleigh .323 220gr. Round Nose Soft Nose SD: .301 BC: .355 bullet as this was the closest to the original specs above and the results:
IMR 4895 ... 40.8grs. = 2050 fps
IMR 4895 ... 41.0grs. = 2055 fps
Overall Length is 2.970
* These were chonographed in 48 degree weather and therefore the possibility of the cartridges bieng cold could change the velocity in warmer weather

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

I used the Nosler .323 180 gr. Ballistic Tip SD: .246 BC: .357 bullet as this was the closest to the original specs above and the results:
IMR 3031 ... 38.5grs. = 2250 fps
IMR 4064 ... 40.5grs. = 2250 fps
IMR 4320 ... 42.5 to 42.7grs. = 2250 fps
Overall Length is 3.037

Last edited by 1886lebel on Tue Jan 22, 2008 1:25 pm, edited 1 time in total.

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308Dave

Post subject:

Posted: Fri Apr 11, 2008 11:19 pm

Master Sergeant

Joined: Sat Aug 04, 2007 9:10 am
Posts: 292
Location: Central PA

What can I make cases from for this? I have read both 45/70 and 7.62x54r.
Dave

_________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin historical review of Pennsylvania [1759]

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