At Peter Hofer booth the two extremes of the double rifle were showed. The biggest is in 2-bore, a gauge used in the past by ivory hunters and then supplanted by Nitro Express cartridges. Shoots a 2,000 grains ball.
The manufacturer did not disclose the doses of powder, but the old black powder version was loaded with 385 grains.
The weapon's weight is 11.5 kg and sends us back at the time when a hunting expedition required many carriers. The smallest is a simple exercise of skill, clearly not to be used for hunting, and is in caliber .17 HMR