Does a "Snap-Swivel" really reduce the number of strikes?

I'm installing new PowerPro 30# line on all my reels today.
I mostly fish for sal****er trout, reds, & flounder in the
Gulf Coast bays, and bass in the freshwater lakes.

Question:
I have heard that it is a pain to tie the PowerPro line.
Is there a "Snap-Swivel" out there that I can use that
will allow me to test different lures, etc. - without
scaring off the fish? Once I have found the lure, etc. that
I want to use, I can tie it to another rod & reel less the
snap-swivel.

If so, what size & brand of snap-swivel? I have never been
really clear on this subject. I have used snap-swivels on lures
in both salt & fresh water & caught fish. Then again, I really
do not know how many I lost either:-)

If anyone has ever seen good scientific data on the subject, please
post a link here.

THANKS,
Gene