Thank you guys for all the great ideas !
If I shot 318 cal bullets do I have to open the chamber neck ?
I shot her some more , 8 out of 10 shots tumbled with 174 & 180Grs
I was keen to rebore & rechamber to a larger Cal for a great alrounder
Shot gun barrels groups well but not to the rifle barrel (not regulated), and shot 4 Rabbits with 4 shots (with shot)
She handles well to not like my Bonehill hammer gun 450-577 Martini X 12Ga ,which has a great rifle barrel !
Because I have no idea what Cape guns are worth I didn,t want too much money tied up in her (need money for double rifle)
I now need to find a stock duplicater over here I suppose ?
Heres a photo of whole rifle & the barrels on ANOTHER cape gun , as you can see Capes have some VERY thin barrels on them !

The barrels on my rifle !

An example of a common Cape barrel

Oh ,what do you think on cutting her down a bit & getting her re regulated by a good smith ?