I have done several thousand .223's on my WFT. I chuck it in my drill press and not a drill. I resize my cases to my desired dimensions and then set my WFT to get the 1.760 length. Some cases are a little shorter than others and they come up short and don't get trimmed. Most end up at least 1.750. LC brass is the longest and takes the most trimming. You will have to chamfer the inside and outside of the case. I chuck my chamfer tool in the drill press too.
kwg
I started using the Hornady case length Comparator to size my .223 and 308 brass. I was sizing my cases to minimum length's and I was always cutting off a lot of neck and I had some really long necks which made using the crimper on the seating die difficult to use because case lengths were odd sizes along with the length of the necks. Once I started using the Comparator I started leaving my cases longer and the necks shorter which meant I was cutting less off with the WFT.
I currently size for two lengths in .223 using the Comparator. I size to 1.460 for about everything and for a Mini 14 with a longer chamber to 1.465. (I do this by using two different RCBS dies set up in a Lee 4 hole turret press) This is for .223 I shoot in AR's, bolt actions and the Mini. You have to measure the fired cases and then take about .005" off (5 thousands of an inch) to make sure they feed good. A factory case in .223/5.56 still loaded and unshot seems to be consistently 1.460" long in my Comparator.
If you are not using the Comparator I highly suggest you try it out. You might be trimming too much material and case length. Now the brass seems to be more consistent making the case easier to crimp with the crimp in a seating die.
kwg