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An apparatus, a kit, and a method of use thereof for assisting snipers or long-range shooters in arriving at a firing solution for adjustment of an aiming system are provided. The apparatus can include a housing including a viewing area and a slide including a matrix of firing solutions printed ther

An apparatus, a kit, and a method of use thereof for assisting snipers or long-range shooters in arriving at a firing solution for adjustment of an aiming system are provided. The apparatus can include a housing including a viewing area and a slide including a matrix of firing solutions printed thereon based on a plurality of density altitude values. The slide is movable with respect to the housing such that a portion of the matrix of firing solutions is viewable in the viewing area of the housing based on a density altitude value. This allows a user to adjust the trajectory compensation of a telescopic sight or any other aiming system by using the current measured density altitude.

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1. An apparatus comprising: a housing including a viewing area; andan interchangeable slide movable with respect to the housing;a slide including an indicia representing a matrix of firing solutions printed thereon based on a plurality of density altitude values being disposed on the interchangeable

1. An apparatus comprising: a housing including a viewing area; andan interchangeable slide movable with respect to the housing;a slide including an indicia representing a matrix of firing solutions printed thereon based on a plurality of density altitude values being disposed on the interchangeable slide;wherein the interchangeable slide is movable with respect to the housing such that a portion of the indicia representing the matrix of firing solutions is viewable in the viewing area of the housing based on a density altitude value. 2. The apparatus of claim 1, wherein the indicia representing the matrix of firing solutions is based on a plurality of density altitude values and on a range of distances to a target. 3. The apparatus of claim 1, wherein the indicia representing the matrix of firing solutions printed disposed on the slide is specific to a bullet type and a muzzle velocity. 4. The apparatus of claim 1, wherein the indicia representing the matrix of firing solutions includes values for wind and drop. 5. The apparatus of claim 4, wherein the indicia representing the matrix of firing solutions further includes values for angle and lead. 6. The apparatus of claim 1, wherein the housing includes a first planar shell. 7. The apparatus of claim 6, wherein the housing further includes a second planar shell including a second viewing area, the first planar shell and the second planar shell being secured together with the slide being movable therebetween. 8. The apparatus of claim 1, wherein further comprising a second indicia disposed on the housing includes including a column of values representing distances to a target printed thereon. 9. The apparatus of claim 1, wherein the housing includes a density altitude calculation table printed disposed thereon. 10. The apparatus of claim 1, wherein the housing includes a spin drift compensation table printed disposed thereon. 11. A kit for determining a firing solution for an aiming system of a projectile firing device comprising: a housing including a viewing area; anda plurality of slides each including an indicia representing a matrix of firing solutions printed thereon based on a plurality of density altitude values disposed thereon, each matrix of firing solutions being specific to a bullet type and a muzzle velocity of a different projectile firing device;wherein each slide is individually movable with respect to the housing such that a portion of the indicia representing the matrix of firing solutions is viewable in the viewing area of the housing based on a particular density altitude value. 12. The kit of claim 11, wherein the indicia representing the matrix of firing solutions printed disposed on each slide is based on a plurality of density altitude values and on a range of distances to a target. 13. The kit of claim 11, wherein the indicia representing the matrix of firing solutions printed disposed on each slide includes values for wind and drop. 14. The kit of claim 13, wherein the indicia representing the matrix of firing solutions further includes values for angle and lead. 15. The kit of claim 11, wherein the housing includes a first planar shell. 16. The kit of claim 15, wherein the housing further includes a second planar shell including a second viewing area, the first planar shell and the second planar shell being secured together such that each of the plurality of slides can be individually, movably arranged therebetween. 17. The kit of claim 11, wherein further comprising a second indicia disposed on the housing includes including a column of values representing distances to a target printed thereon. 18. The kit of claim 11, wherein the housing includes a density altitude calculation table printed disposed thereon. 19. The kit of claim 11, wherein the housing includes a spin drift compensation table printed disposed thereon. 20. An apparatus for determining a firing solution for an aiming system of a projectile firing device comprising: a an interchangeable slide including an indicia representing a matrix of firing solutions printed disposed thereon based on a plurality of density altitude values and a plurality of ranges to a target;wherein the indicia representing the matrix of firing solutions is configured so as to be at least partially viewable in a viewing area of a housing as the interchangeable slide is moved with respect to the housing. 21. A method of determining a firing solution for an aiming system of a projectile firing device comprising: providing a housing including a viewing area;choosing a slide specific to a particular bullet type and muzzle velocity of the projectile firing device, each slide including an indicia representing a matrix of firing solutions printed disposed thereon based on a plurality of density altitude values;determining the current density altitude;moving the slide with respect to the housing until a portion of the indicia representing the current density altitude value appears in the viewing area of the housing along with the corresponding portion of the indicia including the matrix of firing solutions; andselecting an appropriate firing solution for a desired range to target. 22. The method of claim 21, wherein the indicia representing the matrix of firing solutions includes values for wind and drop. 23. The method of claim 22, wherein the indicia representing the matrix of firing solutions further includes values for angle and lead. 24. The method of claim 21, wherein determining the current density altitude includes using a nomograph printed disposed on the housing. 25. The method of claim 21, further comprising providing compensation to the selected firing solution based upon a spin drift effect. 26. The method of claim 25, wherein providing compensation based upon a spin drift effect includes using a spin drift compensation table printed disposed on the housing. 27. A method of determining a firing solution for an aiming system of a projectile firing device to be fired comprising: providing a plurality of slides, each slide being specific to a bullet type and muzzle velocity of a different projectile firing device and including an indicia representing a matrix of firing solutions printed disposed thereon based on a plurality of density altitude values and a plurality of ranges to a target;choosing a slide specific to a particular bullet type and muzzle velocity of the projectile firing device to be fired;determining a current density altitude value;determining a range to a desired target; andselecting an appropriate firing solution on the chosen slide based on the current density altitude value and the range to the desired target.