Leupold & Stevens, Inc.

Tim Lesser

Victoria J Peters

Andrew W York

Rick R Regan

Gary R Williams

Tim L O'Connor

Laura Peter

Steven R Timm

Serge Zaderey

Sergey Yury Zaderey

A method for shooting a projectile weapon involves determining the inclination of a line of sight from a vantage point to a target and a line-of-sight range to the target, then predicting a trajectory parameter at the line-of-sight range, for a preselected projectile. Using the trajectory parameter, an equivalent horizontal range may then be determined, wherein the equivalent horizontal range is the range at which the trajectory parameter would be expected to occur if the projectile were shot from the vantage point toward a theoretical target located in a horizontal plane intersecting the vantage point. The equivalent horizontal range may be utilized to compensate for ballistic drop when shooting the projectile weapon. The method may be embodied in a handheld laser rangefinder including a memory for storing ballistic data. Systems for automatic hold over adjustment in a weapon aiming device are also disclosed.

Ranging methods for inclined shooting of projectile weapon

Ranging methods for inclined shooting of projectile weapons

Rangefinders for inclined shooting of projectile weapons

A method for aiming a projectile weapon may utilize an aiming device having a primary aiming mark adapted to be sighted-in at a first selected range and one or more secondary aiming marks spaced below the primary aiming mark, and includes identifying, from at least two different groups of projectiles, a projectile group corresponding to a selected projectile. An aiming adjustment for the projectile weapon is determined and effected based on the range to the target and the nominal ballistic characteristics of the identified projectile group corresponding to the selected projectile. Other methods of aiming include identifying one projectile group from two or more predetermined projectile groups based on a selected projectile. Each predetermined projectile group preferably includes two or more different projectiles, preferably of different calibers, and a projectile having ballistic characteristics that are approximately median for each such projectile group.

Ballistic range compensation for projectile weapon aiming based on ammunition classification

A method for aiming a projectile weapon involves identifying a projectile group corresponding to a selected projectile and its nominal initial velocity from at least two different predetermined groups of projectiles, determining a range to a target, and automatically determining an aiming adjustment for aiming the projectile weapon based on the range to the target and a nominal ballistic characteristic of the projectile group. The nominal ballistic characteristic of the projectile group may be characteristic of a ballistic coefficient of the selected projectile and the nominal initial velocity of the selected projectile. Also disclosed are systems and methods for determining hold over aiming data and equivalent horizontal range data, for aiming projectile weapons at inclined targets.

Rangefinders and aiming methods using projectile grouping

Ballistic ranging methods and systems for inclined shooting

A reticle of a projectile weapon aiming system such as a riflescope includes a primary aiming mark adapted to be sighted-in at a first selected range and further includes a plurality of secondary aiming marks spaced apart below the primary aiming mark. The secondary aiming marks are positioned to compensate for ballistic drop at preselected incremental ranges beyond the first selected range, for a selected group of ammunition having similar ballistic characteristics. Angles subtended by adjacent aiming marks of the reticle can be adjusted by changing the optical power of the riflescope, to thereby compensate for ballistic characteristics of different ammunition. In some embodiments, the reticle includes a set of windage aiming marks spaced apart along at least one secondary horizontal axis intersecting a selected one of the secondary aiming marks, to facilitate compensation for the effect of crosswinds on the trajectory of the projectile.

Ballistic reticle for projectile weapon aiming systems and method of aiming

Reticle for a gunsight or other projectile weapon aiming device

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Forest Grove, OR, United States of America

Tim Lesser