help with bullet cartridge

[hunting for Wheaties]

I have a 44 rem mag bullet there are two letters running around the base r and p it also has a steel primer i think i know its not copper

 

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[VERDE]

Hey Wheaty!! Probably stands for Remington/Peters!! Mfg's of .44 Mag Ctg's!! GOOD LUCK and GOOD HUNTING!! VERDE!!

 

[hunting for Wheaties]

Hey Wheaty!! Probably stands for Remington/Peters!! Mfg's of .44 Mag Ctg's!! GOOD LUCK and GOOD HUNTING!! VERDE!!

Thanks man do u know time period possibly is it like modern and when i mean modern i mean like 60s and up or is it a little older cause i thought since it wasnt a copper primer it had to have a good little age cause they used copper primers for a good little while now

 

[Indianametal]

Modern some remington pistol brass still says RP