RE: rem 7400?
I have one. I love it and hate it. But it was my first real gun that I had of my own without borrowing. It has never jammed. And won' t if you keep that gas port cleaned out and the the old oil cleaned out of your action. I do with pipe cleaners. More poeple use welding torch cleaners.
I have to say for reloading, it has been the toughest gun I ever reloaded for. its a 270 also. 4064 won' t cycle. Varget won' t cycle. Only thing that will cycle is 4350, but with 1.3" accuracy at 100 yards with Sierra 130gr bullets. I am satisfied with that.
Bad part is the forarm screw. Depending on how tight it is, your point of impact can and will change 8" at 100 yards. I have had many a friend tell me different in theres, and blame POI on bad scopes, bad bases, etc. But when I get them to the range, I show them this and they are amazed they spent money on new scopes and all. This is a pain the a$$.
For a guy like you, I would stay away from it. I dearly love mine however cause its got me more deer than some hunters get in lifetime. And will always use it. This will be the first year, I probably won' t use only this gun for deer in rifle countys. Got a new Medallion I plan on using some also.
Look into the BAR. I have traded these semis for along time, and they are the least jammin Semis you can get in my opinion. But I have seen them jam also. Due to manufacturing defects and poor cleaning practices.
270 is probably the worse caliber to get in a semi. You have a really limited window of operation when it comes to finding a powder that cycles correctly and shoots well if you reload. Might look into a 30-06.