Gents,
I'm pretty sure that I've shot winchester Factory 35 Remington 200 grain silvertips out of my Dad's old Remington 141. Probably been around 30 years ago, but I'm pretty sure they were silvertips. I also know for sure that there were 30-30 silvertips and clearly they were made for tube magazines. I'm underway and don't have my references with me, but if you look up some old winchester catalogs, I'm pretty sure you will find that there were 200 grain silvertip loadings fo the old 35. All the silvertip is is a small aluminum cap over the exposed lead outside the gliding metal jacket.
regards,
Graycg