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colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| .19 Calhoon Hornet Type Hunting Place of origin USA colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Production history Designer James Calhoon Manufacturer James Calhoon colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Parent case .22 Hornet Bullet diameter .198 in (Expression error: Unexpected < operator.
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mm
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Neck diameter .215 in (Expression error: Unexpected < operator.
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mm
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Shoulder diameter .286 in (Expression error: Unexpected < operator.
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mm
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Base diameter .294 in (Expression error: Unexpected < operator.
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mm
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Rim diameter .350 in (Expression error: Unexpected < operator.
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mm
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Rim thickness .063 in (Expression error: Unexpected < operator.
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mm
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Case length 1.390 in (Expression error: Unexpected < operator.
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mm
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Primer type small rifle colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Ballistic performance Bullet weight/type Velocity Energy style="vertical-align:middle; border-bottom: 1px dotted #aaa;
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" | 27 gr (Expression error: Unexpected < operator.
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"|3,600 ft/s (Expression error: Unexpected < operator.
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m/s)
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"|777 ft·lbf (Expression error: Unexpected < operator.
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Source: Calhoon [1]
The .19 Calhoon Hornet is a .19 caliber rifle wildcat cartridge. It was created by James Calhoon after his interest was piqued from learning about British sub-caliber rifle trials in the early 1970s.
The cartridge is based on a necked-down blown-out .22 Hornet cartridge. This provides less stretching, and greater case capacity with a lighter bullet. The result is a flatter trajectory when compared to the .22 Hornet. Having a larger bore than the .17 caliber centerfires helps mitigate some of the fouling problems that rifles in that caliber tend to have.