Mike it was before that. We went from 62/63's to 65/68's. Probably trying to cheat the wind with higher BC's. As I recall that was in the mid to late 80's . Lester and a few others tried faster twists but it wasn't common. I remember trying a 13 and it didn't shoot well. But at that time my observation/tuning skills aren't what they are today. Understand we mostly had button rifled barrels and twist rates were limited and had a +/- factor. I currently shoot a 13.75-13.65 gain twist with bullets on .790" jackets.Would that time coincide with the timeframe of going from mostly 14 twists to 13.5? It would seem logical to. My apologies if Randy addressed that above.