Nothing as huge as 3-bore doga. They were rimfire though, as I said before popular sizes were 5mm to 9mm. The Flobert cases fired the bullet quite gently with the rimfire primer only, although later Floberts had a small propellant charge as well. You could change quickly between bullet and shotshell as the target demanded.
yep weve ownd um in the past years gone why ive got three bore in my head i dont know,was thinking more along the lines of three mm more than like but as you have said 5mm has to be write again my ignorance and a sh!t memery great little gun many happy hours as a kid.