A lot of great advice listed above. Looks like RL22 needs a little work. Hmmm but what kind?
... Once you establish what your maximum load is using RL22, then play with your seating depths to see what bullet jump distances your rifle prefers for best accuracy for that particular RL22 maximum charge.
Try 66g and adjust seating depth. Seating depth plays a huge role at times.
... What I see in your groups is two together, one off, which is often cured with seating depth adjustment. Move to 66 and tinker with depth. Try 4 touching to .003 off, 4 at .010 off, 4 at .020 off, etc and find the sweet spot.
loder
... you could experiment with seating depth and see what the groups do.
An yes, tinkering with SD on your existing loads could very well give you the exact accuracy you're after. I just recently saw a dramatic change in accuracy in one of my rigs with seating depth alone. Always a good thing to visit when loads are almost there or when flyers are present(assuming RO is not an issue).
