SPEmack, check gunbroker now and then. 7mm mags in the zytel "skeleton" stock are really are easy to find and affordable.
I have a few myself. The 77/22 LR is a great trainer for the bigger rifles. My favorite has to be my old 223. Once I found a bullet/powder combo it likes I have had a great time with it. But every m77 mkII deserves a trigger job in my opinion.
So many coyotes....so little time....