Dan,
the analogy I make is splitting wood. What works better, a 2# axe or a 8# splitting maul. F=MxA. The heavier the load the greater the rearward force. In my experience it isn't unusual to find a stock that has split internally before it even shows on the outside. I have repaired a number of them found that way. Wood stocks shrink/swell, and absorb oil around the screws and actions, sometimes for many decades or over a century.
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Keavin Nelson
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