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20 Years of .17 HMR: The Hornady Magnum Rimfire

It's hard to believe the magnum rimfire .17 HMR cartridge from Hornady has been with us for 20 years and one billion rounds. Here's the facts and some fond reflections.

20 Years of .17 HMR: The Hornady Magnum Rimfire

The .17 HMR is based on a simple necking down of the .22 WMR case. According to the HMR’s designer, retired Hornady Engineer Dave Emary, accuracy comes primarily from a very precise chamber and good bullets. (Photo by Michael Anschuetz) 

One billion rounds. Yes, that’s billion with a “B.” Hornady has given shooters a lot to be thankful for in the last 20 years: LeveRevolution, Creedmoor and PRC cartridges, Critical Defense, Critical Duty, ELD-M and -X bullets, and much more. And one of Hornady’s grand-slams was the .17 Hornady Magnum Rimfire (HMR), which was introduced in 2002.

At the start of the new millennium, then-ballistics engineer Dave Emary was...

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