Hal, The Westernfield SB80A is a version of the Savage 29-A and will have the same bolt design as the Savage 29B but is a much earlier gun. I have swapped a few bolts and never had any problems, until now, I have an extra bolt that I thought I would try, it was made slightly different than the ones from three guns I had handy and it would not fit in any of them... so now I don't know what to tell you. The parts lists show them to all be the same and bolts in the three guns all interchanged with one being a little tighter in the other two. The guns were two were mid to late production 29-A's and a 1957 date code 29-B. I did not fire any of them or run rounds through to see if there was any issues with head space. The bolt that didn't fit looked like it was not going far enough ahead so I removed the extractors and cartridge catch so nothing was sticking out the front of it and then it would close. I'll started putting the parts back in and try to see which is the problem.
