Buster, there are two additional benefits to the shape that altered bolt besides

reliable feeding from the magazine..

The thin probe improves air flow around the skirt at firing and accuracy allowing the pellet to self center in the breech.

The rear and being shortened also prevents the hammer pin from hitting the back of the bolt when firing as well.

As long as the bolt still moves the hammer pin back enough to catch the cocking notch, it's a good thing..