Seven-six-five Argy/Belgian/Turkish/Paraguayan etc is easy to load: round is identical to the .303 except for the rimless case. Use .303 loads, components, brass from Trade-Ex.
Alternatively, you can cut-down longer brass on the same head size (.270, .280Rem, .30-'06, 7x57, 8x57 (best) or whatever.
You can also "stretch" FIRED 7.62 NATO/.308W if you arecareful and know what you are doing. Works.
You will need proper 7.65 DIES, but everybody and his dog makes them.