brickeyee:
Your explanation is correct, for almost all padlocks. Fortunately (unfortunate for this experiment) when Master™ fabricated these larger two locks, they had that technique in mind. These large locks are virtually (though not completely) pick-proof, hammer-proof, etc-proof.
That's good for us most of the time. If you get some time, check the website that describes the locks.
I believe that the 2.25" silver lock will be extremely difficult to compromise with anything short of a .50 BMG (which I do not own). I believe that even my .300 Win. Mag. would fall short. I’m not even sure a .300 Wea. Mag. could compromise them. I do have some Winchester® Supreme, Fail Safe™, 150 Grain, .300 Win Mag. ammunition. Those of us who have checked this ammunition with a magnet know that it has a steel core that facilitates deep penetration and holds the round together. However, these padlocks are hammer-forged, heat-treated and shrouded in heat-treated steel. Yikes!
If I test this Winchester® Supreme, Fail Safe™ ammunition, I will have do set up the test inside of the old silo. The rationale should be self-evident. The potential for ricochet would be too high to do in the open, even with a backstop. An abandoned, covered silo would negate any risks of ricochets, and again, firing mechanically, I wouldn't be in any danger.
I have considered ordering some 180 grain, Barnes®, Monolithic Solids™ and handload them. That way, if all else fails, I should have some back up that should compromise them.
Thoughts about the loads, and thoughts about the angle of attack?
Doc2005