Bullet block

[Stumpkiller]

When I was growing up I inherited an auger bit from my father that was adjustable through a wide range of sizes. Very useful for odd sized holes.

Like others, I've been considering a bullet block. One thing I've thought would be exremely useful feature would be a recess the size of the barrel to center the ball on the bore for easier and quicker loading. A Forstner Bit or even a spade bit would do nicely to create the feature.

Any thoughts?

I push one ball lower with my thumb so it aligns itself with the bore when I pull the block for use. Most of mine are "ball thickness". I have one I wear on my chest that is thicker so I don't get lube on my clothes, but it would have to be three times as large if I was to need holes spaced enough to allow a series of muzzle size recesses.