My curiosity has been piqued, what do you find to be desirable in a pistol?
I tend to fall into the camp of the Bolt Pistol is struggling to find a place in the game when the Plasma Pistol exists.
A normal Bolter has a lot of value when compared to the Plasma Gun.
I'd say either the Plasma Pistol is under costed, the Bolt Pistol is over costed, or the current cost for either doesn't make any sense. The Bolt Pistol isn't bad by any means--S4, AP-1, D2 is very good.
The Bolt Pistol has a 13.89% chance to run out of ammo--[(1/6)(5/6)] an ammo check is required and the ammo check is failed--and a 30.56% of reloading using both actions--[(1/6)+((5/6)(1/6))] the first check passes or the first check fails and the second check passes (or 1 - the chance both reload rolls fail [1-((5/6)(5/6))]). In which case you can expect to spend at least 3 activations (really 3.27--1/(11/36)--activations) trying.
While the Plasma Pistol has a 11.11% [(1/6)(2/3)] chance to run out of ammo and a 0% chance to reload.
When I do the math the Bolt Pistol isn't "that bad", but I still think the Plasma Pistol is a better value.