Decided to carefully repeat everything. Got pretty much the same result and established the calipers were not put in straight into the breech so the dimensions pretty much stand. Checked out 11,43x55R Turkishicon Peabody Martini and No2 Musket and it looks close to them. Certainly a .45"ish not .43". The shoulder looks more Turkish than No2. So my Martini mould could be suitable. I have seen references to making No2 from CBC 32 bore cartridges so, presumably one could do the same with Turkish?