I just use a hacksaw then clean up the end with a reloading brass deburring tool. I put the barrel in the drill, poor man's lathe, and deburr both the inside and outside, then use a ratail diamond file to smooth it.
So, I also say cut off an inch or so (whatever it bad) and start over again. Luckily since you are running a suppressor and can go with any length of inner barrel, you are gonna come out golden even with your fuck up.
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