6.5-300 Weatherby Magnum

{{Short description|Rifle cartridge}}

{{Infobox Firearm Cartridge

|name= 6.5-300 Weatherby Magnum

|image= 6.5-Grendel-and-6.5-300-Weatherby-Magnum.jpg

|alt= Rifle cartridges side by side. On the left is the 6.5mm Grendel. On the right is the 6.5-300 Weatherby Magnum.

|caption= Left: 6.5mm Grendel. Right: 6.5-300 Weatherby Magnum.

|origin= USA

|type= Rifle

|service=

|used_by=

|wars=

|designer= Weatherby

|design_date=Roy Weatherby experimented with the design in the 1950s. It wasn’t commercialized until 2016.

|manufacturer=Weatherby

|production_date=2016

|number=

|variants=

|is_SI_specs=

|parent=.300 Weatherby Magnum

|case_type=Belted, bottleneck

|bullet=.264

|neck=

|shoulder=.4949

|base=.512

|rim_dia=.5315

|rim_thick=

|case_length=2.825

|length=3.600

|case_capacity=98

|rifling=1-8"

|primer=Large rifle magnum

|max_pressure=

|max_cup=

|filling=

|filling_weight=

|detonation=

|yield=

|is_SI_ballistics=

|bw1=127

|btype1=LRX

|vel1=3531

|en1=3516

|bw2=130

|btype2=Scirocco

|vel2=3476

|en2=3487

|bw3=140

|btype3=A-Frame

|vel3=3395

|en3=3583

|bw4=

|btype4=

|vel4=

|en4=

|bw5=

|btype5=

|vel5=

|en5=

|test_barrel_length=26

|balsrc= Weatherby{{Cite web |url=http://www.weatherby.com/6-5-300-wby-mag.html |title=Weatherby | 6.5-300 Weatherby Magnum |access-date=2016-11-07 |archive-url=https://web.archive.org/web/20161108133513/http://www.weatherby.com/6-5-300-wby-mag.html |archive-date=2016-11-08 |url-status=dead }}{{Cite web|url=http://www.americanrifleman.org/articles/2016/10/20/the-new-65-300-weatherby-magnum-and-mark-v-rifle/|title = An Official Journal of the NRA | the New 6.5-300 Weatherby Magnum and Mark V Rifle}}

}}

The 6.5-300 Weatherby Magnum is a 6.5mm cartridge created by Weatherby in 2016 for the growing 6.5mm long-range rifle market.