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5mm Remington Rimfire Magnum: The Forgotten Round That Still Packs a Punch

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Via 5mmforums.com

5mm Remington Rimfire Magnum: A vintage rimfire magnum that you have never owned but should.

The 5mm Remington Rimfire Magnum was developed by Remington Arms Company in 1969 to compete with .22 Winchester Magnum.

In 1970, Remington introduced the new bottleneck rimfire cartridge in two bolt action rifles. The Remington Model 591 was developed as a magazine feed rifle, while the 592 was developed to be a tubular magazine variant.

Unfortunately, the 5mm cartridge did not take hold with hunters and shooters in the 1970s, and Remington discontinued manufacture of the rifles in 1974. The ammunition was discontinued a few years later.

While the production life of the 5mm was short lived, the memories that were created with diehard enthusiasts have spanned the last 40 years. The little round has earned quite a cult following over the years, so much so that Centurion Ordinance began production of the ammo again in 2006.

The following for this rifle was so strong that owners were paying 100 to 200 dollars for 50 rounds of ammunition before new production began. Today, 5mm ammunition can be ordered from numerous retailers for under 20 dollars a box.

You may be asking yourself “Why is there such a following for a nearly dead cartridge?” The simple answer: it is the most effective and deadly rimfire created in recent history.

A 5mm round offers more downrange energy and a flatter trajectory than both the .22 magnum and .17 HMR rounds, which can play a pivotal role in bagging your prize when varmint hunting. The 5mm delivers 217 foot pounds of energy at 100 yards. When this is compared to the .22 magnum’s 170 foot pounds of energy at the same distance, you can see why rimfire shooters gravitate to the 5mm.

5mm Remington Rimfire Magnum Specifications
5mm Remington Rimfire Magnum Specifications (Photo Via 5mmforum.com)

Now that I have peaked your interest, you may be looking for one of these rifles to try for yourself. The original Remington Model 591 and 592 can sometimes be purchased at gun shows or auctions. Original rifles to be rare as only around 50,000 were produced by Remington. Thompson Center Arms has also produced the G2 Contender rifle and pistol in this amazing little caliber. If you own a Thompson Center Contender you can now purchase the barrel in a rifle or pistol version.

My 5mm is one of my prized possessions. I have taken numerous varmints over the years and the little round continues to amaze me every time. The last trophy taken was a ground hog at over 200 yards.

The Author's latest kill with the 5mm.
The Author’s latest kill with the 5mm

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5mm Remington Rimfire Magnum: The Forgotten Round That Still Packs a Punch