I am trimin soem brass for 223. The books say minimum of 1.750. After I trim I will need to chambfr/debur. So my question is how far should I trim? I wanna leave room for error for chambfer/duburring. So would something like 1.753 be good? Or to much room for error? I know I have between 1.750 and 1.760 to play with.