Whether a 99 magazine will handle 358/308/243 length cartridges is only dependent on the serial number, not on the current cartridge. If the rifle serial number is 900,000 or higher or starts with a letter, it will handle the longer cartridgers.
Under 900,000 and it won't handle a 358/308/243 length cartridge.
So you can have a 1965 99E in 300 Savage that could be converted to 358 Win.. but you could never convert a 1945 99 in 300 Savage to it.
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The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at
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