Mixing spoke types
So I built a wheel with one of the spokes on a drive side too long. I finally notice this a while later, since I couldn't properly tension that spoke.
I went to my LBS and got a spoke the right length. They didn't have any swagged spokes, only straight gouge. So now I have a 31 swagged + 1 straight gouge spoked rear wheel. I rode it about 100 miles. It seems to be holding up. The spoke tension across each side of the wheel is uniform. Is there any true harm in me doing this? Now that I have the wheel all set up, I don't have the motivation to find a swagged spoke
Not ideal, but it probably won't blow your leg off or anything.
Campy NR / SR forever
You're probably fine, I had to do the same thing. One of my 30 year old Berg-Union chrome plated double butted (swaged) spokes finally broke, and the LBS only had straight gauge (but at least it was stainless stel). So i threaded it in and it's fine.
However, I recently found a source wirth several BOXES if original NOS B-U double butted spokes, and i 'm going to get 5 or 6 boxes for all my old Campy hub, Mavic or Super Champiopn rim wheelsets!
And before everyone starts telling me that chrome plated spokes are no good, etc, re-read the above paragraph - these have lasted THIRTY YEARS, with crashes that have bent wheels, etc., without a SINGLE broken spoke before now. And I think I broke it when removing the wheel - got it caught up in the dropout arrgh...