A 73 precision was listed on eBay a few days back ,and I messaged the seller asking for a few more pics , while I looked at the pictures someone bought it, you gotta be quick on the button these days
I’ve only ever used flats so I can’t comment on anything to do with rounds, but I have been through lots of flats, I’ve switched different brands of 45-105 and similar gauges and haven’t had to alter the truss rod, I think you will be ok