So i have the started working part-time at a gunsmithing shop in my area, "Long Range Customs". While there, i have been allowed to work on my own Weatherby rifles under their close supervision. I have learned from here that the Vanguard barrel threads are Metric, but i have not been able to personally confirm that.
I removed the 20" barrel from my Vanguard VGL 7mm Mag and in checking the threads on it, it seems to match the Winchester threads at 1 x 16tpi. Incidentally, i attempt to "Gently" thread on a Winchester barrel and it threads right on. However, it starts getting snug about 3/4 of the way on. Does anyone have any experience with this... Thanks, :{)