That .35 Whelen of yours is a great cartridge. I used Nosler partitions in mine, 250 gr. I think. I used IMR 4064 powder. It absolutely flattened a 5x5 Bull Elk. I sold it after I bought my .375H&H. I love old guns. A friend of mine had a .308 Norma, all I remember about it was the vicious recoil. Have fun with reloading ammo....I sure do!