.45/70 405gr. Load

[2-.36 1861 NAVYCOLTS]

GOING FOR ELK IN NEW MEXICO 1ST. WEEK OF OCTOBER. WOULD LIKE TO BRING MY RUGER #1..45/70 AS A BACK UP RIFLE (YOU NEVER KNOW). LOOKING FOR A LOAD FOR IT USING .405 GR. FNJSP. HAS ANYONE HAVE ANY GOOD LOADS FOR ME?
PS. MY MAIN RIFLE IS A .35 WHELEN BUILT ON A '98 MAUSER ACTION WITH A 24" SHILEN BARREL, USING HAND LOADS OF, 51.GRS OF IMR4320, REM. 91/2M PRIMERS, AND NOSELER 250GR. PARTITION HEADS.