Arisaka completly surrounds the cartridge with the barrel shank and has very good gas venting in event of ruptured case. 1903 has unsupported case for about 1/8" ahead of extractor groove and poor gas venting on low number rifles. Very late war Arisaka rifles were of poor quality steel, you could not get me to shoot one. I won't shoot a low number 03 either.
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