I use Peterson brass and never had issues with it
I fireform 300 NM & 338 NM brass into 6 of my wildcats, 6.5mm, 7mm, .308, .338, 375 & .408 cal
7mm Rem Mag into 338 Win Mag
300 Wby into 340 Wby Mag
Also use 300 Win Mag in several rifles and made a bunch of .350 Rem Mag brass out of it
Good stuff, more info here on my initial inspection 2 years ago
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Peterson brass
