BSA, in the 70's, 80's and 90's I shot at shooting ranges, what I thought was quite a bit, 100 to 200 rounds a week and sometimes a little more, especially when shooting IHMSA and other low level target competitions, but during those times, I only hunted less than 20 days a year. I used Leupold scopes mostly, but a few other brands too, Nikon, Burris, Bushnell. Since I have retired and now live in Europe, I usually only shoot for sight in and practice shooting, when I can. The Leupold scopes I used were what ever Leupold was offering at the time in hunting scopes, fixed and variable. I do not still have any of those from the 70's and 80's. The ones I have now were made in the 90's up until around 2010 and a few a bit later, VX-2 1x4, 2 VX-2's and a VXR. Other Leupold scopes that I have and use now are 2.5x Compact, FXII 4x, FXII 6x, 2.5x8 VX-3, 1x4 VX2. RJ