What is bumping the bullet?
With a mould that doesnt fit the barrel, some folks will mechanically distort the bullet to more or less fit the barrel in an effort to make it shoot better. We do not believe this to be a viable alternative to actually making the bullet right to start with. It is very difficult to bump a hundred bullets identically and it takes a special swage to do it right, adding another step that is completely unnecessary. If the mould is made correctly, a swage wont help the bullet and can only damage it.