Wyatt's Outdoor

Wyatt's Outdoor mags are stamped steel and allow for a longer loading length.  The five-round magazine for our .300 detachable magazine assembly allows for a COAL of 3.700″. While the Mag for the 338 cartridges gets you up to a COAL of 3.79". 

* The Weatherby 378 parent case will only allow 4 in the Mag.