Hacksaw.

Another thing to consider is that every firearm has a "breaking in" period just like new boots or a new engine. After the first few hundred rounds you will notice that the rifle(should) work smoother and with less snags.

Solid lead ammo not only feeds less reliably in most semi-auto .22 rifles, but it fouls the hell out of them. If you use lead ammo I would suggest you get a good wire(not plastic) bore brush and some good solvent cleaner. Things like your action will gum up fairly quickly using solid lead ammo as well so a good field cleaning kit will pay off big time to aid in keeping it firing. This may be just as important as any spare part if you intend it as a survival rifle.

Just my take