I have finally sourced a suitable Mauser-actioned .458 Winchester Magnum which I intend to have re-chambered to .458 Lott. Essentially, this means cutting a further 3/16" out of the WM chambering - the rifle will then be able to fire the ballistically much improved Lott cartridge (400gn bullet at 2,550fps / 5,800ft/lbs) whilst retaining the ability to fire the more widely available .458WM cartridges if necessary. The drop-floor magazine has enough room for the slightly longer Lott cartridge, so no modifications should be necessary beyond ensuring a smooth and reliable feed (quite important when a cross Buffalo is bearing down at speed ).
I appreciate it's a bit of a niche question but can anyone recommend a good riflesmith who is likely to have a .458 Lott reamer, i.e. someone who does work on dangerous game / Africa calibres. I'd normally get Mike Norris to do this kind of work but he didn't have the reamer when I mentioned my plan to him - buying a new reamer specially makes the job very expensive.
I also intend to try and get this rifle conditioned for wild boar in the UK, so it doesn't just languish in the cabinet inbetween infrequent trips abroad and so I can zero here with expanding ammunition as well as solids. I'm aware there is a precedent for this in West Mercia, so it's worth a try . Given the price of a .458 round, I won't be asking for fox and ground vermin...