Hello flashhole:
In reference to the problem you asked about; I have had a super 14 in 35 rem. for about 15 yrs. I reload for almost all my guns, and I had the problem that you were asking about, but only with reloads. All factory brands that I bought first worked properly and shot great. The problem came with the reloads, I contacted a friend who had been into TC's for 20+ years, the best info he gave me was to necksize only or create the false shoulder as some others have suggested.
I also have killed many deer with my marlin in 35, love the cartridge. I bought mine in the 70's when they were 88.oo. It's very accurate and I shoot 180 gr.fn in mine. The TC with 14inch bbl. doesn't loose much, power- wise to the marlin, or at least the deer don't know the difference.
You will not be dissapointed,
hope this encourages you,
safety first
HM