Mine scanned at 163% today, which I was very pleased about (particularly since there were quite a few first time Badger Face, which tend to start with singles and take the average down) as the scanner had seen a very high barren rate at the beginning of scanning, presumably due to SBV. I'd already decided it would be much worse to hear "Well, she's carrying twins but I don't like the look of them," than "Barren ..... barren ..... barren".
From weaning to 3 weeks before tupping we keep the ewes and rams out of sight and smell of each other, run a ram next to the ewes for 3 weeks then put him in for 3 weeks. We get one or two returners that were a bit too late in their cycle to take the first time around but most are tupped within 16 days, which keeps lambing tight enough for our system and saves the faff of sponging or running teaser rams.