I’m specifically looking at the Nichols depth finder. Wondering what weight (1oz or 1.5oz) would be best for working 16-22ft grass lines at a pretty good speed. I don’t want to be dragging on bottom but I want to be only a few feet up.
Thanks! 

To get down to 15+’ and be able to move it at any reasonable speed you want 1+ ounce AND smaller (ideally willow leaf) blades.  Bigger blades and rounder/cupped blades give lift.  Given the depth you’re looking at, go the heavier of the choices you have.  

I’m of the opinion that spinnerbaits can’t be too heavy. 

Here is a little trick used often south of the border.  Take a normal 1/2 oz spinnerbait, slide a 3/4 oz bullet sinker on the line above the spinnerbait, you can also add a bobber stop on the line to hold the weight against the spinnerbait.  This may look to crude and simple to work, but sometimes simple is the best way to go.  The first time I saw it done, I asked if that would work, and the angler said why not.  Many years later, I still haven't found a reason why it wont work, because it flat out catches them.    

36 minutes ago, king fisher said:

Here is a little trick used often south of the border.  Take a normal 1/2 oz spinnerbait, slide a 3/4 oz bullet sinker on the line above the spinnerbait, you can also add a bobber stop on the line to hold the weight against the spinnerbait.  This may look to crude and simple to work, but sometimes simple is the best way to go.  The first time I saw it done, I asked if that would work, and the angler said why not.  Many years later, I still haven't found a reason why it wont work, because it flat out catches them.    

You bet it works.  And not only for depth.  I do this pretty regularly to adjust for various flow rates on the river.

I take the drop shot sinkers and hang them off the hook like a trailer hook and they work still but I think I like @king fisher ‘s Texas rig spinnerbait deal even better!

You can also take the rubber piece out of a rubber core sinker, and crimp the sinker on to the hook of a spinnerbait.   

33 minutes ago, king fisher said:

You can also take the rubber piece out of a rubber core sinker, and crimp the sinker on to the hook of a spinnerbait.   

I have been doing this for years. 

A long time ago, I used to keep solder in with my tackle and in a pinch would wrap solder around the hook just behind the head and under the skirt.  If I needed deeper, a few more wraps; shallower I’d trim a wrap or two.  Thank god for weights.  I’d have to take out a second mortgage to buy solder today.

Booyah makes a great 1oz. spinnerbait. It's call the covert spinnerbait

 

https://www.tacklewarehouse.com/Booyah_Covert_Double_Willow_Spinnerbaits/descpage-BYCDWSB.html

 

 

The pegged bullet weight suggested is your best option. Easy to adjust running depth without having to change or buy more spinning baits.

You can paint the weights.

Tom

9 hours ago, OldManLure said:

You bet it works.  And not only for depth.  I do this pretty regularly to adjust for various flow rates on the river.

I use to fish those little strike King  Mini Spins in heavy current below a dam. I would add a bullet weight to aid in casting and keep it at the desired depth. 

14 minutes ago, scaleface said:

I use to fish those little strike King  Mini Spins in heavy current below a dam. I would add a bullet weight to aid in casting and keep it at the desired depth. 

Below a dam is a perfect example.

I don’t know if they still make them but Ledge Buster Spinnerbait made some up to 2 ounces . 

I pour my own baits and have a selection of deep water lures at 1/2 oz. I kind of copied the dimensions of a 1/2 oz Rocket shad .I  use a single willow blade . It sinks quickly and stays down there, I dont have trouble casting it like I do with heavy baits..