vent. rib barrel, purpose of?

buzz11648 · January 18, 2002, 05:45 PM

What is the purpose of a vent. rib barrel? strength?

stinger · January 18, 2002, 07:48 PM

i believe it aides in cooling of the barrel.

Quartus · January 18, 2002, 08:29 PM

Heat wave, shimmer, reduction of, in sighting plane.

I like 'em 'cause they give me a good line along which to sight.

JohnPL · January 19, 2002, 07:31 AM

Look down a road on a hot summer day-the view is distorted by the heat coming off the asphalt. Same effect looking down a hot barrel. The raised rib does two things-it gives a nice flat sight plain (as opposed to a curved barrel) and it is not in constant contact with said hot barrel, allowing it to remain somewhat cooler, with air circulating underneath to allow more cooling.

Dave McC · January 19, 2002, 08:31 AM

The guys are right on the money. Less "Mirage" and better cooling. Plus....

All bbls bend during the launch. O/Us bend less since the other bbl serves as a brace. All else equal,the stock on a SXS can be straighter than one on an O/U for the same POI. This is why trap guns tend towards exaggerated high ribs. They use a straight stock and have to raise the rib to keep things in proportion.

The rib serves as a brace, also, meaning that the shotgun can be stocked a little straighter, thus lowering felt recoil a trifle.

And, the extra metal serves as a heat sink, so it takes more shots to get warm enough to have mirage be a problem.

January 18, 2002, 05:45 PM	#1
buzz11648 Junior Member Join Date: December 29, 2001 Location: waynesboro,PA Posts: 9	vent. rib barrel, purpose of? What is the purpose of a vent. rib barrel? strength?

January 18, 2002, 07:48 PM	#2
stinger Senior Member Join Date: November 6, 2001 Location: west texas Posts: 772	if i am wrong someone will correct me i believe it aides in cooling of the barrel.

January 18, 2002, 08:29 PM	#3
Quartus Senior Member Join Date: May 8, 2001 Location: Virginia Posts: 3,823	Heat wave, shimmer, reduction of, in sighting plane. I like 'em 'cause they give me a good line along which to sight. __________________ . Better to know what you don't know than to think you know what you don't know.

January 19, 2002, 07:31 AM	#4
JohnPL Senior Member Join Date: January 31, 2001 Posts: 105	Look down a road on a hot summer day-the view is distorted by the heat coming off the asphalt. Same effect looking down a hot barrel. The raised rib does two things-it gives a nice flat sight plain (as opposed to a curved barrel) and it is not in constant contact with said hot barrel, allowing it to remain somewhat cooler, with air circulating underneath to allow more cooling.

January 19, 2002, 08:31 AM	#5
Dave McC Staff In Memoriam Join Date: October 13, 1999 Location: Columbia, Md, USA Posts: 8,811	The guys are right on the money. Less "Mirage" and better cooling. Plus.... All bbls bend during the launch. O/Us bend less since the other bbl serves as a brace. All else equal,the stock on a SXS can be straighter than one on an O/U for the same POI. This is why trap guns tend towards exaggerated high ribs. They use a straight stock and have to raise the rib to keep things in proportion. The rib serves as a brace, also, meaning that the shotgun can be stocked a little straighter, thus lowering felt recoil a trifle. And, the extra metal serves as a heat sink, so it takes more shots to get warm enough to have mirage be a problem.