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Firing a 10-Bore Flintlock Rifle – a Dinosaur Killer!

A .775 caliber flintlock rifle is the gun an 18th century pioneer would use to fend off dinosaurs. 

Of course 18th century pioneers and dinosaurs is B-movie science fiction stuff. But this 10-bore flintlock is definitely the gun that would star in the movie.

Forgotten Weapons‘ Ian McCollum talked with Arms Heritage Magazine‘s Q&A Editor Mike Carrick as Carrick displayed, loaded and shot a very rare and beautiful 10-bore, or .775 caliber flintlock rifle.

The recoil of the rifle is vicious, which is no surprise when you see the size of the radish-sized lead ball Carrick rams down the barrel.

The rifle is a replica of a 1792 British rifle and was made by riflemaker James Gefroh of Fort Collins, Colorado.

The loading process is fascinating, even for an experienced black powder enthusiast.

Carrick loads 200 grains of 3F Swiss black powder behind a wad and patched .760 caliber, 660-grain lead ball. 660 grains equals about 1.5 ounces of lead.

As a point of reference, in the movie “Jeremiah Johnson,” Johnson covets the powerful and iconic .50 caliber Hawken rifle. The .50 caliber Hawken would have shot an approximately 180-grain lead ball – slightly less than a 1/2 ounce – ahead of only around 80 grains of powder.

You can see that a .760 caliber ball is a whole lotta lead.

Upon firing the rifle, a startled McCollum curses and exclaims, “That thing’s got recoil! Holy cow!”

Carrick charted 1,584 fps and a generated muzzle energy of 3,678 ft/lbs with the powder charge he loaded. He also declared the rifle to be extremely accurate, as he is able to consistently hit a saucer-sized target at 100 yards.

Of course, the hole left by the large ball is probably the size of a saucer as well.

SEE MORE: Super Cool Lorenzoni Repeating Flintlock Pistol From the 17th Century

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Firing a 10-Bore Flintlock Rifle – a Dinosaur Killer!