Marlins and Rugers are generally cohesive with .431 cast bullets.
My fav is the NOE replica of the H&G 503 265 Keith and 8.5 grs CFE Pistol.
For more serious work, the LBT 300 WLN GC and 18 grs. Lil'Gun ups the speed a bit and runs accurately out enough to 300 yards with irons on 8 inch plates with the Marlin.
I realize most don't have the cast bullet options; I too would lean towards the 270 Speer if one had to purchase a universal heavy for a rifle and handgun.
