We used to shoot several times a year (changed now and then). We only shot duty ammo once per year. Our practice ammo was an equivalent but a full metal jacket. There can be a bit of price difference if you buy ammo by the 10’s of thousands. I doubt that DHS uses hollow points for practice, but they may. Most agencies fire duty ammo once per year sometimes once every 2 years. WE used to shoot what we carried and were issued new. Figured that it had been exposed to the elements.
Yes, DHS does use hollow points for practice. I am absolutely sure of this.