Come on guys. Not trying to be nasty or anything here but I have one piece rods and sectioned rods. And with a tight patch, they all flex inside the barrel. I clean my guns from .17 cal on up to 12 gauge. I have one piece rods from tippon, brownell and sectioned rods from Hoppes and Outers. they all work.
the only thing I can tell you geterdun, is to clean you rifle and shotgun from the chamber end and not from the muzzle. Of course, if you have a pump gun, you're out of luck unless you use something like a boresnake.
If you use a rod, I suggest you get the appropriate size jag for your 270 instead of using one of the slotted type tips you get with most kits. With the jag you run the patch through the barrel once and not dragging a dirty patch back down the barrel.