Gents, Need some ideas/help. I'm using a Giraud trimmer to trim all my .223 brass, and I've used it successfully for quite some time. That said, I've changed a few things in my reloading process, and as of late my trim consistency has gone down hill; I would normally attribute this to a shoulder bump consistency problem, but I can't seem to detect a problem with headspace comparator. Brass Details: Lapua .223 Brass ~4-7x fired with heavy charges of Varget behind a 90gr VLD. (Relevant) Reloading Process: Deprime Wet Tumble AMP anneal Resize w/ Redding Type S bushing die & Redding comp shell holders (setup for .003 bump w/ a 'camover' fit). Mandrel expand back up .001. Dry tumble lube off Giraud trim Here's the screwy thing, I'm getting consistent shoulder bump indications on my brass using a Hornady comparator. They're all within .001 of each other on the setback (showing 1.458 - 1.459), however when I run them through the Giraud, I'm getting wildly inconsistent trim lengths. The trim lengths are varying ~.010. Typically with a trimmer that indexes off the shoulder this would indicate a shoulder bump problem, however they're all showing very closely on the comparator. Any ideas? I've re-setup the trimmer/dies/shell holders repeatedly, and can't seem to figure it out.