The Newcomers: What the 8.6 Blackout and the 7.5 FK Add to a Shelf of Old Cartridges

Most of the cartridges here are decades or a century old. Two are not, and they show where ammunition is heading.

Most of the cartridges on this shelf date from the 1890s to the 1960s. Two are recent designs, and they are a useful contrast.

The 8.6 Blackout

The 8.6 Blackout is a .338-caliber (8.6 millimeter) cartridge designed to run in AR-style rifles. Its heavy bullets, typically 285 to 350 grains, are often loaded subsonic, which suits suppressed shooting. Its loads are at 8.6blackout ammo.

The 7.5 FK

The 7.5 FK is an FK BRNO design sold with lead-free copper bullets. The company's monolithic copper loads are at 7.5 fk monolithic ammo.

What the old guard offers by comparison

Next to these two, the old cartridges look simple. The 7.62x39 FMJ at 7.62x39 fmj ammo dates to World War II. The 7.62x54R's Sellier & Bellot loads, at sellier & bellot 7.62x54r ammo, date from 1891.

The 8mm Mauser, at 8mm mauser ammo for sale, goes back to 1888 and its 1905 update. Its stronger cousin, the 8mm Remington Magnum of 1978, is at 8mm remington magnum ammo.

The 9.3x72R's soft-point loads, at 9.3x72r soft point ammo, carry on a European tradition for break-action rifles.

The 22 Hornet is a sporting design from 1930, and anyone who wants to buy 22 hornet ammo will find it in many small lever and bolt rifles. The 22-250, with Underwood's loads at underwood 22-250 ammo, is a faster sporting round.

The 25-06, at 25-06 ammunition, is another faster sporting round.

Opposites in spirit

The two newcomers are almost opposites. The 8.6 Blackout is built around heavy bullets at modest speed, often for quiet shooting. The 7.5 FK is built around light, fast, lead-free bullets. Both are answers to questions that the old cartridges were never asked.

What to watch with new cartridges

Newer cartridges have fewer makers and fewer rifles. Confirm the chambering, and check that the loads you want are made before you buy the rifle, not after.

Newer cartridges are less widely supported. Confirm that your rifle and your supplier both carry the cartridge, and confirm current stock and state shipping restrictions before ordering.