Actually, you're much better served to practice in DA as that is the long heavy trigger pull - and it's also the method that will be used for the crucial first shot. Lots of dry firing in DA tends to smooth out the trigger pull as well.

To answer your question - either cock the hammer or rack the slide...

 

The Sigs are safe to dry fire. The method I used to master the DA-SA trigger was to do what I call "draw, double tap". Shoot one round DA and one round SA. Decock and holster. One box of ammo a week for about 8 weeks and I had it down pat. My fast double taps were nearly touching at 10 yards.

Dry fire DA and shoot a few boxes of ammo and you will be pretty good at it.

 

you will build muscle memory and smooth out the action, too.

 

Actually, you're much better served to practice in DA as that is the long heavy trigger pull - and it's also the method that will be used for the crucial first shot. Lots of dry firing in DA tends to smooth out the trigger pull as well.

To answer your question - either cock the hammer or rack the slide...

this is true. my little bersa thunder plus da trigger is pretty sweet for a low cost handgun

 

Actually, you're much better served to practice in DA as that is the long heavy trigger pull - and it's also the method that will be used for the crucial first shot. Lots of dry firing in DA tends to smooth out the trigger pull as well.

To answer your question - either cock the hammer or rack the slide...

Great point. I keep pre-cocking at the range and this will hold true for house defense situations, but eventually, I may carry due to my profession and I'll need to know how to shoot well in DA too.