Strange, as on my squad last Thursday there were two F3 users who used to have DT11's and found they kicked like mules and found them virtually unusable even when professionally fitted. So is this about how you hold the gun? How come one person finds gun X a real kicker and another gun Y but not the other way round? Is it the carts they're using or some kind of weird way that the energy interacts with the shooter's shoulder and dissipates through their body, or how tender their shoulder is? (Have they been shooting a lot recently). And the same with cartridges come to that.