The problem I see with the bolt press is that as the washer presses the balls home and shaves lead the washer will bottom out on the lead shavings. This means the nose of the balls will be a few thousandths of an inch over-flush of the face of the cylinder. This could cause binding/jamming on cylinder rotation.
It might be possible, after the ring is shaved, to pluck/rip the shavings out with a pocket knife before completing the drive-home process.
Steve
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