I don't have the Kodiak but I do have a 45-70 Sabatti DR.

Being in Aust I use ADI powder and am unsure of the equiv where you are.

I load up to lever action strength in my DR but don't know what the Kodiak is rated to.

I do make a pleasant light plinking/practice round with a cast 405gr projectile and 13gr of Trail Boss.

My most accurate load is a cast 300gr proj travelling around 1900/2000fps.