Speaker wiring question

I would be curious to see if anyone ha measured the resistance (etc) across stock bridge bars compared to jumpers.

Also, for my own benefit, is there any downside to making jumpers out of the same speaker wire I am using? In other words, for my low end system I bought 100% copper, low oxygen 12 awg speaker wire. I guess the questions are 1) Would it hurt anything to use it as a jumper? 2) Is there any chance it would improve anything (in low end Polk Audio 3 way towers)?

Thanks for the replies.  Freediver:  they are actually cable jumpers and not brackets.  Why do you think I would get much better performance if I connected to the bottom (low end) just curious.  All the illustrations for non biwiring do show connections being made on the bottom.  just wondering if there is a sonic difference or to  just to keep things uniform.  Would it then matter if you connected to the high end instead? I am going to experiment but don't think I'll be able to hook things up again for a few days

I tried what I mentioned above. Made two pairs of jumpers out of the same speaker wire I'm using for the speakers, good quality, good size. Put banana connectors on one end for the upper posts. Just used bare wire for the bottom posts. Will get some set screw spades for the bottom posts when I get a chance (hard to find them cheap the way you can bananas).

Did it make a difference? Broader sound stage, brighter roomier highs, tighter bass. Really? I don't know. Probably not. I'm the type of guy that would swear that my car runs better after I wax it. ;-)

So, just wondering, did you try them both ways?

I’m wondering why anyone uses jumpers in most cases.  Oft the wire can be threaded through the LF post to the HF post and screwed down accomplishing the same function as the dreaded brackets supplied.  Same wire type, problem solved.