Assuming you are handloading, I think you have found your load. They is done mighty fine shooting, dead nuts at your distances.
And that winny, is sweeettt!
That rifle was made, when both, Winchester, and Remington, where both putting out some great shooters.
I have a winny, m70, in seven mag, which was a Wal-Mart gun, I believe, and it shoots out lites.
Great shooting!