Chain fire poll

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How many of you have experienced a chain fire?  Is this more or less of a problem than it was in the 19th Century?  Does the revolver design make a difference?  How about loading technique?  Does it usually jump from nipple to nipple or chamber mouth to chamber mouth?

WhatÂ’s the overall consensus?

Years ago I had a chain fire with a buddyÂ’s replica something or other, loaded with grease over the balls.

In more recent times I have acquired a Ruger Old Army and have been loading a pre-lubricated felt wad over the powder followed by the ball with no grease.  So far I have had no problems with this combination.