dok

You could always have a straddle type band that only covers the bottom half the barrel and have it sweated on with a cornish tin solder, this way other than for a reblue, the front foresight band can remain in place, thus minimising further exposure to heat of the barrel.

Holland and Holland often did this on their magazine rifles especially where the barrel was too large a diameter for their standard banded swivels.

Whatever mods you make, make sure they include a second recoil lug on the barrel and glass bedding to this and the action lug. Supplement this also with two steel cross bolts and if possible relieve a small area of wood to the rear of the action tang, say about .020", this will allow an expansion slot for the rear tang on firing and prevent splits from setting up when the tang drives back.

The latter happens when the wood to the side of the magazine box accordions on firing, if there is a space to cater for this, the tang cannot drive into the recess.