Hi Adam,
Must've been the wrong type or a bad batch you had. The brass-tipped 115gr FMJ S&B work without at hitch in my 1906-pattern. No problems with lead shavings or unburned powder. Feeding is good, although they don't like my MecGar mag
Sadly, the Winchesters are difficult to obtain here (and strangely they are more expensive...)
See ya,
Gerben