The Speer .429 240gr and 270gr softpoints are also worth considering. Cheaper than a XTP and a "bonded" jacket type construction. Really its a plating but a very well done plating.
https://www.grafs.com/retail/catalog...roductId/17354
These are a bargain at under $13/50 and since they are most likely also intended for 444 Marlin they should be excellent for a upper level ML load too.
Rons test with 80gr of BH209
270g Deep Curl -- 80g Blackhorn
https://www.grafs.com/retail/catalog...roductId/17355