Sir Samuel Baker may have had a two guage rifle. He did have one that used a half pound projectile, but it may have been a 4 bore with a conical. His book isn't very clear on that point. He did say it spun him around, gave him a nose bleed and the headache lasted a couple of days. That approaches the definition of "too much gun" which is one that does more damage to the shooter than the game animal might. :m2c: