I understand that length in most cases will equal a higher velocity. I was just wondering what the optimal length would be for this caliber. And yes, I know that barrel length was measured in mm's. Sooo, why was the carbine barrel length approximately 300mm long? Was this length chosen just because or was there a specific reason for a barrel around 300mm long?
Lugerdoc, isn't 400mm almost 16"? I was sure that the carbines were closer to 300mm.
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