I own both and they have a reputation as a jam-O-matic.
If you keep them clean and very lightly oiled and use factory rem. ammo they seem to work and shoot pretty good. If you reload for them keep the velocity around 2700 f/s. and use small base dies to full length resize. that will keep them shooting.
I have a 7400 shoots 2" groups. point of aim changes every third shot,
nature of the beast, tried every thing to get it to shoot more consistent.
BUT i have killed a truck load of deer with it using 140gr hornady bullets.