.366 DGW

The .366 DGW is a wildcat cartridge that was originally designed by Maine gunsmith Judson Stewart Bailey, and named after its original creator, David G. Walker.

Development

According to Frank Barnes' "Cartridges of the World" (14th Edition), "Walker's idea was to achive optimum performance from the .416 Rigby parent case, directly necking it down to accept .366 (9.3mm) bullets.

With a .24-inch barrel propelling high sectional density and ballistic coefficient bullets at relatively low pressures, Bailey believes the .366 DGW will shoot flatter and out-penetrate the Remington Ultra Magnums, the .338 Lapua, and the .338/378 Weatherby.

In 2001, Bailey successfully hunted with the cartridge in South Africa, taking zebra, kudu, warthog, wildebeest, nyala, blesbok, and gemsbok.

Ballistics

The ballistic data below is from Cartridges of the World 14th Edition, sourced from Judson Bailey.

Bullet Type & Weight (gr.)	Powder Type	Powder Charge (gr.)	Velocity (ft/s)	Energy (ft lbs)	Source
Nosler Boat Tail 250 gr.	IMR4350	98.0 gr.	3,253 ft/s	5,875 ft/s	Judson Bailey
Nosler Partition 286 gr.	IMR7828	103.0 gr.	3,020 ft/s	5,775 ft lbs	Judson Bailey
Swift A-Frame 300 gr.	H4831	97.0	2,911 ft/s	5,607 ft lbs	Judson Bailey