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He points to engine pistons as examples. He says "seizure" of perfectly-fitting piston/cylinders can occur; under compression of firing, the piston may seize for a moment and apply immense stress to the cylinder.

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A race mechanic once told me that a Formula 1 race engine has to be pre-heated to near operating temperature before it can be started as when cold the pistons are seized solid. Can't comment on that, but perhaps temperature can also play a part in creating OSR with tight bullets?

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You are absloutely right thuy are docked to a heater before startup, but i think its the main bearing on those engine that are stuck, or at least also.

So firing a buch of proper bullet before to warm her up and then a couple of hard ones perhaps helps, anyone up for it.

btw, i wonder who the upset one with the 450/400 was? I would have gotten up to the barnes booth and gone bärsärk.