...it bobbled (ftf) on my defense ammo,Sig Elite performance 124 gr jhp., it fed the 115 gr fmj fine. This Sig ammo has a wide mouth kind of jagged profile. Also shot without a strip and clean.[emoji106]
While it could be that this Sig V-Crown ammo is presenting feeding issues, I would recommend trying it again after cleaning and giving the 908 a fresh lube. A new $2 factory recoil spring is also highly recommended with a used gun (Smith & Wesson Recoil Spring S&W 3953TSW 3913 3914 - MPN: 100950000).
I personally have yet to find an ammo type that will not feed & function in my 908 or other 39xx models, though I have not tried the Sig stuff. Any of the offerings by Federal HST in 9mm would be an excellent choice for the 908, as well as the Speer Gold Dots in 124 or 115 grain.