OWD: The only S x S gun that IMHO is more attractive with a ventilated rib is the Model 21 Winchester....or at least that I have seen. It seems the market agrees because the ones with vents cost more than matted. This may be due to rarity. I believe, and at one time I was a competition shooter, that vent ribs do dissipate heat. More importantly is to remove oils from barrel prior to high volume shooting. I have seen heat waves with a vent esP on a hot day. Obviously it evolved with competition shooting in mind. Some ribs on modern guns, e.g., adjustable ribs were developed with POI in mind. Buzz

Socialism is almost the worst.