There is provided a hydrogel having a self-supporting property that can be produced only through mixing at room temperature, and there is provided a method by which the hydrogel can be manufactured by using industrially easily available raw materials. The length of the blooming cycle is about four to five weeks. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the feed screw to enhance consistency in material flow through the cartridge. The invention further relates to the inbred and hybrid genetic complements of plants of variety CV493546. Another portion of the range finder includes a plurality of disks that are adjustably positioned on a support member so that the range finder can be individually calibrated for specific game also taking into account the physical characteristics of the hunter. The insert further includes a rotation axis about which the insert can be rotated and spring means urging the insert toward the position that it assumes when no plug is present.