Thread: Type 38 project
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Old June 20, 2017, 03:27 PM   #9
44 AMP
Join Date: March 11, 2006
Location: Upper US
Posts: 18,547
Have the barrel slugged while you're at it, so you know what the bore diameter actually is.

Depending on what the bore diameter actually is, you might not be able to easily find jacketed bullets of the proper size. Wide variations in groove diameter have been reported. ALWAYS, ALWAYS wear shooting glasses.

The older manuals usually had this warning. Gas blowback, due to undersize bullets (resulting in insufficient pressure for the case to seal the chamber) was known to happen.

The round is not particularly powerful, driving a 140gr to around 2300fps and a 160gr to about 2000fps from a 19" carbine barrel, with top end loads.

Good Luck with your project!
All else being equal (and it almost never is) bigger bullets tend to work better.
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