50-800 usd
It sounds like you have a Mauser made Browning in Safari Grade. The "P" at the end of the serial number is an unknown character. Value depends on condition. Use the blue book link for values
Best left to a professional gunsmith.
How value is Browning 300 Win Mag Semi Automatic
50-300 usd
50-300 usd
50- 300 usd
300 or so.
300-800 USD
50-300 USd
100-300
300
300 USD or so