Less available, but pricewise? Seems all the defensive buckshot I know of is running about $1 a shell. The cheap stuff like Rio is maybe 20% cheaper. I don't think price is an issue comparing it to 12ga, but for 20ga? I doubt the cost would be any different.
I was buying Rio in 12ga & 20ga* buck shot for about .35 ea for a flat of 250. *I'm positive it's Rio in 12 & pretty darn sure it's also Rio in 20ga.
A couple yrs ago. Actually, a couple years pre china bug. The Military buckshot in the plain brown box was 5 rounds @ about $6. Most run if the mill buckshot or slugs were in the 75+ cent range on ammoseek. Mini shells and reduced recoil were a buck or more. Rio seems (seemed) to flood it out cheap a few times a yr. A few different times I could get flats or sleeves for about half the cost of others; not 20% less. That's my experience.
