Are they lead or plated?
If lead, you really need to know the barrel's groove diameter since lead bullets need to be at least 0.001" over groove diameter. 9x19 barrels can range from 0.354-0.362", with 0.355" being a very loose nominal.
If plated, keep speed below 1200fps--easy with 9x19.
For both, follow suggestions above--need enough case mouth flare to allow bullet to seat without contacting the case mouth and deburr case mouth so burrs don't damage the plating. Load a couple of inert rounds (no powder or primer) and adjust COL so rounds feed and chamber easily. With plated bullets, pull a bullet and determine if crimp has damaged the plating.