Does anyone out there have a good starting load for a siamese mauser?I thought about using the loads from a mauser 8mm to start but I would like something a little more definative.The cartridge by the way is 8x52R.
Cartridge Cases and Primers Used for Load Development: Cartridge Case: Remington (R-P) ... Reformed .45 / 70 brass **** Cartridge Case Length: 2.037 Primers Used: Alcan Large Rifle 'Max-Fire' / CCI 200 Large Rifle / CCI BR2 Large Rifle / Federal 210 Large Rifle / Hertzers 120 Large Rifle / Remington 9 ½ Large Rifle / RWS 5341 Large Rifle / Winchester Large Rifle / Wolf Large Rifle
(196 grain loads listed above can be used for these bullets)
The Siamese Mauser Type 66 does not have a .323 bore. It is .327. While the rifles shoot the above listed loads well they do not work well beyond 200 yards. A .327 bullet shoots very well at long distance. The French Lebel MG 196 grain bullet can be used and shoots close to MOA. Privi 208 grain .329 bullets sized to .327 using a LEE die work very well also. I have never seen even a hit of pressure problems and fired 50 rounds yesterday at 300 meters and was able to hold 2 MOA even with a hot barrel. The rifles are strong and the barrels are very accurate with the right load. **** You do not HAVE to use .45-70 brass. All it does is aid in ejection,not extraction. I have used 7.62x54R which will clear the action if the bolt is smartly cycled or 8x56R brass which works just fine. The Russian reformed brass is one millimeter too short but have not caused any accuracy problems. All three cases will have an hour glass shaped web when fired in the Siamese chamber. This does not cause any problems with case life.
Gulf of Tonkin Yacht Club NRA Endowment Member President NM MILSURPS