Close but no cigar! My rounds weigh 110 lbs each and use aprox 20-30 lbs of powder to fire down range. The cal. is 155 mm or 6.1 inches.
For I am a loud & proud cannon cocker! A good crew of MARINES on a M109A3 can set & fire within 90 seconds!
LOL! So your the guy that kept putting holes in my markers in AZ. Shame On You!
That is some kind of major power.