Essentially, Can I compile a speedloader to go HMMHMMM

I Need to use a pistol with my medic loadout for RP and for preference of playstyle (If I have a decent weapon I will charge any T2 I see.)
I usually go with Mod88 with BC and aim attachments just to churn out damage but I am tempted to lean towards Heavy for the stun and damge of the marsman. Can you load a cylinder yourself and set start point?

Thankyou and goodnight