This is a 17 Rimfire Magnum Article from the 1992 Shooting Times that discusses a .17 Rimfire Magnum that was developed in 1988 by a man named Steve Chernicky. His .17 Rimfire Magnum was shooting a 20 grain bullet at 2700fps! Shooting Times did a full article on the cartridge in 1992, ten years before Hornady released the 17HMR and we have it here.
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*All articles are published for educational purposes only.