.30 Walker
| .30 Walker |
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| Type |
Rifle |
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| Place of origin |
 United States |
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| Production history |
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| Designer |
Mark Walker |
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| Designed |
2003 |
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| Specifications |
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| Parent case |
.220 Russian |
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| Case type |
Rimless, bottleneck |
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| Bullet diameter |
7.82 mm (0.308 in) |
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| Neck diameter |
8.38 mm (0.330 in) |
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| Shoulder diameter |
10.87 mm (0.428 in) |
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| Base diameter |
11.15 mm (0.439 in) |
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| Rim diameter |
11.2 mm (0.44 in) |
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| Rim thickness |
1.5 mm (0.059 in) |
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| Case length |
38.7 mm (1.52 in) |
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| Overall length |
57.5 mm (2.26 in) |
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| Rifling twist |
1 in 10 to 1 in 18 twist |
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| Primer type |
Small rifle |
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| Ballistic performance |
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| Bullet weight/type |
Velocity |
Energy |
| 112 gr (7 g) BIB |
2,950 ft/s (900 m/s) |
2,164 ft·lbf (2,934 J) |
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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".
References
Cartridges derived from the 7.62×39mm or its derivatives |
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| | First generation derivatives | | |
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| | Second generation derivatives (based on 5.6х39mm/.220 Russian) | |
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| | Third generation derivatives (based on 6.5mm Grendel) | |
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