Firearm with shell holder

1. A shell holder for a firearm having a mounting facility, the shell holder comprising:

a body including a plurality of bores each defining a bore axis;

a plurality of elastomeric elements, each associated with a different selected one of the bores;

each elastomeric element having a protruding portion that protrudes a selected and continuously adjustable distance into the bore responsive to compression of the elastomeric element; and

a plurality of movable adjustment elements, each connected to the body outside of the bores and each operably engaged to a different selected one of the elastomeric elements to compress the associated elastomeric element in a direction substantially parallel to the bore axis;

wherein the selected distance the protruding portion of an elastomeric element protrudes into the bore is adjustable through a range of protrusion amounts based on an adjustment position of an associated adjustment element, and the selected distance is independently adjustable for each elastomeric element;

wherein the adjustment position is fixed relative to radial outward force exerted upon the elastomeric element for all adjustment positions; and

wherein the elastomeric element is positioned at one side of the bore, so as to provide an eccentric lateral force on a shell.

2. The shell holder of claim 1 wherein the shell holder is mounted on a shotgun.

3. The shell holder of claim 1 further comprising:

the movable adjustment elements each including a jaw movable with respect to the body;

a gap defined between the body and each jaw; and

the elastomeric elements being received within the gaps such that the elastomeric elements are compressed between the jaws and the body.

4. The shell holder of claim 3 wherein movement of a selected one of the jaws towards the body narrows the associated gap and increases the distance the protruding portion of the associated elastomeric element protrudes into the associated bore by compressing the elastomeric element.

5. The shell holder of claim 3 wherein movement of a selected one of the jaws away from the body widens the associated gap and decreases the distance the protruding portion of the associated elastomeric element protrudes into the associated bore by expansion of the elastomeric element.

6. The shell holder of claim 3 further comprising the movable adjustment elements each including a fastener that selectively positions each jaw with respect to the body.

7. The shell holder of claim 6 wherein each fastener is a bolt threadably engaged with a locknut.

8. The shell holder of claim 1 wherein each elastomeric element has a central aperture that increases the compressibility of the elastomeric element by rendering the elastomeric element hollow.

9. The shell holder of claim 1 wherein the mounting facility comprises holes for receiving front and rear trigger pins of a firearm when the shell holder is mounted on the firearm.

10. A shell holder for a firearm having a mounting facility, the shell holder comprising:

a body including a plurality of bores, each having an interior space and defining a bore axis;

a plurality of jaws movable with respect to the body, each associated with a different selected one of the bores;

a gap defined between the body and each of the jaws;

a plurality of elastomeric elements, each received by a different selected one of the gaps;

a portion of each elastomeric element protruding, in a protrusion direction, a distance into an associated one of the bores responsive to compression of the elastomeric element in a direction substantially perpendicular to the protrusion direction; and

a plurality of fasteners to selectively position the jaws over a range of positions to compress the elastomeric elements with respect to the body such that the distance the elastomeric elements protrude into the associated bores is continuously adjustable over a range of protrusion amounts by the fasteners;

wherein the elastomeric element is positioned at one side of the bore, so as to provide an eccentric lateral force on a shell.

11. The shell holder of claim 10 wherein the protruding portion of each elastomeric element defines a portion of the interior space of each of the associated bores.

12. The shell holder of claim 10 further comprising:

the elastomeric elements each having a main wall facing the body;

the elastomeric elements each having an opposing wall facing the associated jaw; and

wherein a selected elastomeric element compresses and a portion of the selected elastomeric element is extruded into the associated bore as the associated fastener positions the associated jaw closer to the body and narrows the associated gap.

13. The shell holder of claim 10 further comprising:

the elastomeric elements having a main wall facing the body;

the elastomeric elements having an opposing wall facing the associated jaw; and

wherein a selected elastomeric element expands and a portion of the elastomeric element retreats from the bore as the associated fastener positions the associated jaw farther from the body and widens the associated gap.

14. The shell holder of claim 10 wherein each fastener is a bolt threadedly engaged with a locknut.

15. The shell holder of claim 10 wherein the shell holder is mounted on a shotgun.

16. The shell holder of claim 10 further comprising:

wherein the facility comprises holes for receiving front and rear trigger pins of a firearm when the shell holder is mounted on the firearm;

the shell holder having a mounting plate including apertures that are axially registered with the holes; and

each aperture receiving a screw that also passes through one of the holes and replaces the corresponding trigger pin of the firearm.