01-10-2024, 04:17 PM
When I re-barreled the 1st Howa Mini that I'd worked on, I used the pulled factory bbl as a rough standard, and measured to the boltface with a depth mic to see what sort of clearance the factory uses. I had two lathes, and kept the JET set up to cut Imperial threads, and a Precision Matthews with gears for metric threading. However, the 1mm thread for Mini actions requires yet another gear change from the more commonly used 1.5mm threads used on full-size metric actions.