One of the interesting things about doubles "doubling" is the recoil energy is actually four times as much instead of twice as much.
It would be twice as much IF the gun weighed twice as much--but the gun weighs the same, hence the 4x recoil energy.
In general the 9.3x74R, like it's cousin the 9.3x62, is considered a relatively mild-recoiling round for a medium-bore. But I had an 8-pound 9.3x74R side-by-side double for a few years, and one day it doubled when shooting at a target. It felt more like a friend's .505 Gibbs....
