25 Weatherby RPM

[semperfi87]

I’d love to hear everyone’s thoughts on this new quarter bore cartridge? I’ve always been a 257 Roy fan I was thinking of building 25 PRC and then this came out?

 

[bnewt3]

B

Post in thread 'New Weatherby Cartridge'

Jan 7, 2026

Interesting, Weatherby rifles are known for long throats

• bmart2622

 

[Bater]

I guess I wouldn't mind one in an ultralight Mark 5, but with a lightweight 25SAUM I have little need personally...

 

[DroptineNW]

The whole rpm line is super well done up. If there was more rifles elsewhere and ammo made for it.. it would take off.

 

[gerry35]

Petersen makes the brass so I can't see any downsides to the cartridge. Weatherby supports their rounds too. Very well designed, seems like they got it just right.

 

[khuber84]

72gr case capacity, it's pretty much a 25prc/saum built on a stretched 6.5x284 case. I wasn't too impressed with the Peterson x284 brass VS Lapua in my use.