doghead

I have been using winch shear pins that i bought from Saturn Surplus. I seem to shear them pretty easily. My question is, should I be able to winch the truck forward if the object I am hooked to does not move with the brakes depressed to the point that all wheels skid? (level sandy ground ,engine 800 rpm) When I first got the truck, it had a grade 5 bolt in it. I was able to shear that and a few more when i had not read the tech manual and chained the truck to a large tree and tried to winch something very heavy and the truck was facing a 30 foot drop-off. When I realized that it uses an aluminum pin, I promptly ordered some and have been using them. I can tell you that when the bolts sheared, there was a light "snap" noticed. With the aluminum pins, I feel nothing. The only indication of it shearing is the fact that nothing is moving. I really would like to think that the winch is capable of "dead dragging" the deuce with all wheels locked. For me this has not been the case. I do realize there are capacity increasing options such as doubling with a pulley and less cable on the spool. In any case I just want to know if you guys have had better success than me when it comes to Heavy winching with your trucks. Is everyone here using the aluminum shear pins?

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M818, M819, M35A2 w/w, M35A2, M109, M561 w/w, M274, M1008A1, M146, M105, M116A2, M101A2, Pioneer tool trailer, MEP-002, MEP-017A, 1990 Dodge Tug, 5ton winch shear pins