Can somebody tell me what the equivelent weight in grains would be for a 1 ounce shotgun slug? I've got a couple of boxes of Winchester rifled slugs in 12 ga that say they're 1600 fps, and I was wondering how much energy in ft-lbs this would equate to? Thanks for any help.

437.5 gr = 1 oz

There are 7000 grains in a pound, and 16 ounces in a pound, so 1 ounce = 437.5 grains.

Thanks guys!! I knew it wouldn't take long to get an answer!! Now, if I did my math right, a 435.7 grain slug at 1600 fps produces 2486 ft-lbs at the muzzle, right??

I would not count on that 1600 fps being right. I have chronographed one slug load and it was closer to 1400 fps and the Brenneke's are way slower than that!

JohnK007

Yep, your energy calcs are correct for the data given.