Fired the 18 1/2 inch carbine just to see if it fuctions before doing anymore work on it. I fired it with three different mags, fired Win 115 gr FMJ, Collins 124 gr FMJ and Win 147 gr SXT. the gun fed all three different rounds the same. It stove piped once out of about 40 rounds. The rest chambered fine manually, but did not extract andn did not work semi automatic. Does the John Martz carbine fire semi automatic or must you manually operate the toggel? Also fired my Martz Baby Luger. I worked great and was accurate. But it would not feed the Win 147 gr SXT, I think because it has a more blunt point. My J. Dewey target luger fired all three type of ammo fine. Would a heavy 9mm load made the carbine function properly?
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