Those rotary magazines are very particular to the original cartridge the gun was made for. Going from 308 to 358Win may work, but from 300 Savage to 358 Win may not work so well.I have pops '99. I sold off my '99/300 cause the price offered was needed else where at the time.
Pops is a 308, I bought for him when he was really down on the Winchester 88 he had ta have didnt measure up. It was simply a "Monday or Friday" gun as Bret pointed out. It was stiff to operate and never shot well. He shot the '99 with same load he had for the 88 and all three touched with zero last owner made. He sold that 88 the following weekend! Invested in a "better" scope then the 3x Weaver that the Savage wore.
Anyhow, Im a 35 cal guy to the core and since the day he gave it back to me, I have had JES rebore ta 358 in mind.