I can't speak for RD loops, but it's pretty common as pointed out above, that with loops, the drummer used in the recording doesn't always play exactly on the beat, either pushing or pulling it as the style requires.

This is true with Beta Monkey drum loops.

Stratocaster, this sounds more like a problem with the style chosen with the RD tracks and what your guitarists 'felt' as they recorded, versus what was 'felt' by the studio RD drummer.

Lastly, there is the option I have shared with you before in the past. There's a certain drummer that can be found on-line named Lorenz Schimpf, who will lay down live drum tracks, very well recorded for a VERY reasonable price. He'll need the song with a click track and drums removed.

-Scott

My Songs, photos, writing,etc.
My Sound Cloud