You should be able to get it down to at least 2 1/2 lbs and be safe. When you gete it down whee you think it is OK, slam the bolt closed several times and again with the bolt closed rap the butt on the floor a few tiemes to be sure it wont slam fire on you.The gritty feel may just be crap on the moving parts. blow it out with a blast from a can of WD-40 and try it. After adjusting, degrease the screws and put some nail polish on the threads to prevent them from backing out.
El Lobo
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