I know it's off topic, but thought it might be entertaining.  Last year I bought a Rolling Block that was supposed to be in 50-90 caliber but turned out to be the longer 50-140 caliber.  After finally getting all the dies and components, I got to light it off last month.  What a hoot!  Here's the round.

http://img.photobucket.com/albums/v254/williammathews/th_50-140Sharps002.jpg

I'm using a 720 grain six groove bullet.

WKM

Yikes, how painfull was that?

Oddly enough, though many state that once you shoot it, you will sell it, it was not nearly as bad as I thought it would be. However, my first group of loads use the minimum load that I could find in print; 40 grains of AA5744.  If using black powder, of course it's around 140 grains hence the cartridge name.  It does kick a fair amount; such that I will have to practice on my concentration rather than anticipated recoil.  I did shoot about a dozen rounds with no shoulder bruising.  It sure ain't  no Whisper cartridge.

WKM

AR related how?

Ouch! That'l hurt...

Holy crap!
That would leave an impression on a burgler. Imagine the look on some thugs face if you lit that up under his arse!Wouldn't even have to hit'em, just scare'em to death.