Question when Changing Brass/Giraud Trimmer

[Batteriesnare]

I've done quite a bit of reloading for .223 in the last year with S&B .223 brass. It's worked well, no crimp on the primers, and seems pretty consistent lot to lot. Unfortunately the brass is on its 6th reload cycle, so I'm starting to process the Wolf Gold brass that I had in buckets.

My process is:

Decap
Wet tumble
Dry in dehumidifier
Swage (for Wolf)
Size
Trim (Giraud)
Load on 550B

This worked very well for the S&B, and I was consistently getting 1.745" trims from the Giraud. Without changing anything, the Wolf brass is trimming from 1.747-1.500. Obviously I can change the trim length, but I'm curious why this would be the case when the brass changes. Can anyone point me in the right direction?

I'm also not particularly thrilled with having to change my seating and crimp dies on the 550 every time load a different type of brass. Will this extra .002-.005" make a meaningful difference in either? Bullets are Hornady 55gr FMJBT w/cannelure over 24.5gr of TAC.

I'm also curious on the swaging (using Dillon 600). From what I've read less is more on .223, but I still get 10-15 cases in a run of 100 that are very difficult to seat primers on (won't go in on 550). Should I increase my swage across the board, or just set those aside and restart the process with more swage for those pieces?

Thanks for your help!