There's a lot of wasted space in ordinary shot shell cases (- talking about "wastes of space" - like some folk - they are full of hot air) - so these minis don't give away much performance.
The slugs are quoted at 1,250 ft. per sec. - as are also the buckshot loading.
They'll let you load a lot extra bangs for your buck and recoil much less if you're sensitive or playing games shooting from the hip.- Should be OK in break-actions too.
That's FIVE shorties to Three 3 inchers.
Any of you interested in edged weapons - there is an excellent on-line post about the K-BAR and Fairburn-Sykes iconic blades and their history. - Google 'The KA-BAR and the Fairburn-Sykes' by Roger Norling' - A very well researched story.
Interesting to note that "double sided blade" knives are a "banned import" here in NZ. (Is that in case they are used to cut two things at once?)