Recording Trigger Pull Gauge

RECORDING TRIGGER PULL GAUGE

The Recording Trigger Pull Gauge will measure and record in pounds and ounces the amount of weight required to actuate the trigger on any hand-held firearm in both single- and double-action mode. The maximum trigger pull weight that can be measured by these Gauges is 2, 6, 12, and 25 lbs. respectively. These Recording Trigger Gauges are intended to pro- vide the gunsmith a means of measuring any improvement in trigger pull when performing trigger or action work.

m WARNING m Never attempt to disassemble or reassemble a firearm unless you are absolutely certain that it is empty and unloaded. Visually inspect the chamber, the magazine and firing mechanism to be absolutely certain that no ammunition remains in the firearm. Disassembly and reas- READ & FOLLOW THESE sembly should follow the manufacturer’s instructions. If such instructions are not immediately available, contact the manufacturer to see if they are available. If they are not available at all, then you should INSTRUCTIONS consult other reference sources such as reference books or persons with sufficient knowledge. If such alternative sources are not available and

BROWNELLS GUNSMITHS DATA RING BINDER GUNSMITHS BROWNELLS DATA you have a need to disassemble or reassemble the firearm, you should proceed basing your procedures on common sense and experience with similarly constructed firearms. 200 S. Front St. Montezuma, IA 50171 With regard to the use of these tools, the advice of Brownells Incor- 800-741-0015 or 641-623-4000 • www.brownells.com World’s Largest Supplier of porated is general. If there is any question as to a specific application Firearms Accessories and Gunsmithing Tools.™ it would be best to seek out specific advice from other sources and not solely rely on the general advice and warnings given.

HOW TO USE Before working on any firearm check to make sure the gun is UNLOADED. Remove or open the magazine, open the cylinder/bolt and visually check the chamber to make certain it does not contain a live round. Once you are sure the rifle/handgun/shotgun is unloaded and safe, then and only then, should you continue to follow these instructions. Two different trigger hooks are available for the Recording Trigger Pull Gauges. The 5" length is used to measure the trigger pull on handguns, 1 and comes as standard equipment with all four versions. The 14 ⁄2” length comes with the 25 lb gauge, and is available as an option for the others. by the brass body, and gently pull straight back on the trigger of the 1 Use the 14 ⁄2" hook for rifles and shotguns. The hooks are “open” where firearm. Please Note: When measuring single action trigger pull weight, they attach to the scale’s spring rod loop, so they can be easily changed. If the firearm must be cocked. When measuring double-action trigger pull it is desired to permanently attach a hook to the rod, use pliers to pinch weight, the firearm must be uncocked. It is important to keep the trigger the open end of the hook together around the spring rod loop. With the hook as close as possible to the length-wise centerline of the buttstock. proper trigger hook attached to the Gauge, hold the Gauge vertically so This will direct the pulling force parallel to the axis of the bore and yield the trigger hook is hanging down. Use the small, knurled adjustment a more accurate reading. Be sure to carefully control the movement of the knob, located at the top of the Gauge, to set the weight indicator and Gauge body so you can stop pulling immediately when the sear and ham- YOUR THESE INSTRUCTIONS IN SAVE recording “tally” to zero. Then, turn the Gauge horizontal. With the trigger mer disengage or the striker falls. Record the weight from the scale on the hook resting on the bench top, so it is not affecting the weight indicator, Gauge, re-cock the firearm, reset the Gauge, and repeat at least five times double check the zero on the scale, and readjust if necessary. to get an average weight of pull. To check trigger pull weight, first secure the firearm in a padded Reassemble the firearm according to the manufacturer’s instructions. bench Check for proper functioning using ACTION PROVING DUMMIES. Make vise so it cannot move. Secure the firearm horizontally and in such a way sure ALL SAFETY MECHANISMS are fully functional as designed and as not to impair or impede its mechanical function. When possible, protect approved by the manufacturer. If these tests prove satisfactory, test-fire the firing pin by using a snap cap in the chamber(s). Make certain you are the firearm with live ammunition in a SAFE and APPROPRIATE manner. using inert snap caps, NOT live ammo! Snap caps use a cushioned nylon, IMPORTANT! Start the live ammunition tests by first loading an ACTION Delrin® or brass insert in place of a primer. Set the trigger hook in the PROVING DUMMY, then a live round, into the magazine. Only after sev- center of the trigger where the shooter’s finger would normally rest. With eral tests have been conducted in this manner should additional rounds be the recording “tally” resting against the weight indicator, hold the Gauge placed in the magazine and fired.