Streching brass?

[Lumpy Grits]

I only shoot GG bullets. When my .45-90 brass is longer than 2.405". I trim back to 2.395". This in for a factory Shiloh bbl.
Here's my '90 load that works very well.
Annealed S'line brass-Lightly FL sized(I use a .45-110 FL die)-Case mouth expanded to .4565"-Fed match or CCI br2 primer-.40 cal coffee paper wad at the bottom of the case-85gn of Old 'E'-.060 LDPE wad-Paul Jones Creedmmor bullet cast 30:1 and shot 'as cast'-Bullet seat'd to just cover the top grease groove-Pan lube w/DGL-Close case mouth to .476"-.478" dia.
I blow tube only.
Gary