A comment from one with 1/2 century of experince. The "ammo you want" may NOT be the ammo that your handgun prefers.
As stated, in the interest of economy you really should use some midstream breakin/practice ammo and introduce the SD ammo after running some generic stuff through your pistol. A proper clean/lube process prior to shooting is adviseable.
Don't be the person who buys a SD gun and the "hottest thing going" in the ammo world w/o getting familiar with the gun and ensuring that the ammo functions 100% in your particular pistol.