How to Set Up a Tasco Pronghorn Scope
Tasco optics makes a series of scopes under the Pronghorn name. These scopes offer a larger field of view with a multi-coating that gives clear images through increased light transmission. These scopes are made for mid- to long-range shooting. When first setting up the Pronghorn scopes, there are two parts: pre-siting and zeroing. Take the scope and rifle to a firing range and prepare to spend half a day adjusting and setting up the new scope.
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Instructions
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1
Set the rifle on sandbags or a barrel vise at the firing range. Open the chamber and attach the Pronghorn scope to the rifle's scope screw threads on the top of the firearm. Turn the Pronghorn's lock screws clockwise to secure the scope to the rifle.
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2
Look through the chamber opening, down the barrel. Move the rifle until the center of the target is in the center of the bore. This is known as bore-sighting. Do not move the rifle. Look through the Pronghorn scope and see where the scope's crosshairs are in relation to where the bore-sighting was. If the scope and bore are closely aligned to the center of the target, it is bore-sighted. If not, turn the scope dials until the scope aligns to the bore-sighting. Alternatetly, use a bore-sighting tool to align the scope rings. Many firing ranges have these tools available for customers. Set the bore-sighting tool onto the scope rings and adjust the ring dials until the bore-sighting tool pins are level and aligned.
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3
Load the rifle. Take a practice shot using the Pronghorn scope at a target 100 yards away. Notice where the shot hit in relation to where you were aiming. Turn the side knob (on the right hand side) of the scope in quarter-turn increments to adjust the horizontal alignment of the scope. This is the windage adjustment. Take practice shots and adjust until your desired setting is reached.
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4
Turn the elevation adjustment knob in the top-center of the scope in quarter-turn clockwise increments to adjust the vertical accuracy of the scope. Take practice shots and make adjustments until the vertical accuracy is to your liking.
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