If people wanted absolute reliability in o/u’s(and SxS’s)they’d adopt the snap action underlever concept, that would also act to cock the hammers. The action bodies would be stronger, easier to manufacture, easier to time, and have a much longer wear window. This would also allow for the firing pins to be less angled, which only has benefits. The actions would be ambidextrous, only difference would be the stocks; cast-off for right handlers, and cast-on for wrong handers. Bonus points if we are talking a striker fired concept with sear override lockwork.
I dont think Miroku does this.
But people just had to have the top lever…
Some of the first and earliest breech loading “automatic” or hammerless actions were designed exactly like this.
More “modern” versions of the action would be the Manufrance Ideal, Thomas Woodward Spiral spring, etc. I like them, for pretty much the exact same reasons you seem to. With that said……I believe the masses had spoken, pretty much all of the makers agreed with them…and the top lever was made the standard.
