I agree with the choice of Maple leaf especially the MR bucking (old version and new). However all their buckings are good, and they work very well with the Omega nub, which is my go to nub for all buckings. However ML buckings can cause feeding problems with some guns - it is down to the longer and thicker lips. Some people have sanded them down, to make them work, and this apparently can sort the issue. From my experience a longer nozzle can sort this problem, or alternatively go for a TNT TR bucking, I have used quite a few of these and they are superb. They are like the ML MR hop, effectively a drop in R hop rubber.
The long and short of it is, if a Maple Leaf bucking and Omega nub works in your rifle it will work well, especially when paired with a Maple Leaf barrel.