I don't know but I would be gentle. I cut one inch off the counter bored section of a Meteor barrel ( leaving 1/4 inch) and was surprised how easily...
Thats a real shame and somethng that worries me a little when my times up, I could've punched some of a Mates family on one occasion as they started...
Have you tried a Glow sight or similar on the Beretta, won't correct the Blur per se but you'll have a reference point your eye can see easier, only...