Everything Mike just said!

I should add that when the subject of .577 DRs on shotgun actions was discussed here in the distant past, I got my hands on a Zabala and discovered two interesting things:

- the width across the breech-face of the Zabala 10-bore was a couple of mm less than the width of a 12-bore Greener Empire!

- the extra weight of the 'big ten' was simply due to a couple of lumps of scrap iron inserted into the buttstock!