Thats a lot of jump on the 69's. seriously try them with the varget. Also your going to find that light bullets react fast to o.2 grains difference in powder charge so its quite easy to miss the nodes. Stop shooting in the wind also, even at 100 yards the drift on a 50 and 55 grain bullet is insane, especially when looking for a load and doing developement.
Try this. seat a bullet in a empty case really long, slide it into the chamber and hold the bullet tight to the lands. slide your cleaning rod down from the muzzle end until it touches the bullet and draw a circle with a felt pen around the rod right at the muzzle.
remove the case and bullet and close the bolt, slide the cleaning rod until it touches the bolt face and mark the rod again, measure between the two lines with your calipers and this will give you your coal to the lands. try it a few times and take the average. Its a poor mans trick but it works. I flat ended tip on your rod works the best, or a old plastic jag with the tip ground off. Use the same bullet you used to measure the lands to make your dummy round.
Now set the bullet 10 thou deeper and do your work up loads, when you find the best group you can play with the bullet seating depth to see if you can improve it. I have shot 1.5 inch groups to .2 inch groups with the same rifle and same powder load just by varying the seating depth in a .222 rem.
Precision reloading is more indepth then precision shooting, both take the same consistancies from start to finish, the slightest change will effect the end results and from what I am seeing, unless I missed something is your lack of work up loads. If you just picked a powder load from a book then I am going to suggest that that is what you did wrong.
Food for thought, load the 69 grain SMK with 24.7, 25.0, 25.3, 25.6 and 25.9 grains of varget with a coal of 2.500 and shoot five shot groups with these loads and post your results, we should see some sort of result with this. just looking at a group with one powder weight and one bullet tells me nothing, I could compare that to factory ammo and tell you to buy a different brand of ammo and try again until you find what your gun likes.
Hope this makes sense.