|Place of origin||United States|
|Parent case||.220 Russian|
|Case type||Rimless, bottleneck|
|Bullet diameter||7.82 mm (0.308 in)|
|Neck diameter||8.38 mm (0.330 in)|
|Shoulder diameter||10.87 mm (0.428 in)|
|Base diameter||11.15 mm (0.439 in)|
|Rim diameter||11.2 mm (0.44 in)|
|Rim thickness||1.5 mm (0.059 in)|
|Case length||38.7 mm (1.52 in)|
|Overall length||57.5 mm (2.26 in)|
|Rifling twist||1 in 10 to 1 in 18 twist|
|Primer type||Small rifle|
The .30 Walker is an intermediate cartridge developed by Mark Walker of Houston, Texas.
This cartridge is an improved version of the PPC cartridge family necked up to accept .308" bullets. The .30 Walker was designed for 100-300 yard bench rest and f-class shooting using 112-118 grain flat based bullets in slow twist rate barrels.
The .30 Walker case may be made by using Lapua 6.5 mm Grendel brass and increasing the caliber to .308 and turning the neck diameter to .330".
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