Swamp refers to the profile of the barrels - wide at the breech, narrowing to a waist and then flaring some towards the muzzles.

flintlock longrifle barrels are a good example because the profile is more pronounced

look at the specs here -
http://ricebarrels.com/chart.html

I was looking for a older thread about frame sizes and barrel weights but couldnt find it .
Theres a #3 frame 10 ga on GB with the barrel weight listed and stamped on the flats as 12 . Surely that doesnt mean 12lbs ?

Is it perhaps a 12 gauge, not 10?

yes, it says "The barrel weight is 12."

that does make it rare

guess I should keep mine out of the rain since that have gone up that much :rolleyes:

I wonder how accurate that is though ? Just seems unlikely on a #3 frame they still have plenty of taper or contour to them .

I dont think its worth the asking price however as its still a grade 2 .

theres a 12 ga on there also that is stamped 12 in the same spot as that seller says is the stamp for the barrel weight .

almost 8K - that's about 7 - 8 times too much for that one

Especially when there are two grade 2 10 ga hammer Parkers listed under it for 2800 and 1800 .

BTW - just checked - my 3 frame 32" barrels on a grade 2 10 hammer gun are marked 5lbs 4 oz

I want to say I seen some posted on here before in the 8lb range ?
Most #3 frame 10s I see are in the 9.5lb range for the whole gun .
Sometimes I see a few 10 lb 10 ga #3 frames . I wonder how much more those barrels on those guns weigh .