I don't have my old one but will try to explain how to make one: Get your self a can...........like maybe a soup can or one of similar size (eat the soup first). With the lid off, drill two holes (in one side and out the other) at the top of the can just under the lip. Now take (what I used was more or less like heavy welding rod or say something about 1/4" in diameter. If you are going to check the trigger weight with the stock on, you will probably need it to be about 15" long on the one side. Make a right angle bend (get the rod at least 20" long to start with) a little longer than the diameter of your can. Then make another right angle bend at the other end about the same length. What you want is the right angle end to sit on your trigger and the can "being directly below the trigger!" Not off the side! Weight the can and the rod. Now start adding weight. You can use sinkers, shot, nuts and bolts, whatever? Set your trigger and "hang" this arrangement on the trigger and start adding weight to the can...................REMEMBER the can must be directly under the trigger so the weigh is straight down. When the trigger breaks, set it again and attach the can/rod. You may have to play with the weights a few times. NOW, along with a halfway accurate scale, weight the can/rod/weights and you should have a pretty accurate assessment of your trigger pull weight.......OR Spend $60 and get a Lyman electronic trigger pull scale
Richard... That is a darn good little apparatus to check pull weight... And you explained it well enough that I built one in the back of my head while I was reading your post.. If made correctly and careful placement of the rod, can and weights it should give a very accurate measurement of the trigger pull weight.