got hold of 500 155gn swc and a pound of clays. Hodgons site
for 155gn is 3.7 for starters. I have seen some using 3.2gn. anyone else using Clays would love to hear. shooting the 40 shield. (love the gun)

Not a common combination!

Load a sample (say 25) of the published data, and adjust up or down at your personal discretion from there. I use Clays in a number of light loads. One of the benefits is, Clays is not "Position Sensitive". So a light load is still pretty consistent, if the powder isn't bunched up against the flash hole.

Ivan

I have never gone wrong, had any problems when I used published load data...

Tried it years ago in the 38 and 357 with JHP and lead bullets.
I did not have my chrony back then but I did go by how the test grouped vs the other powders that I used.

In the end, I used the rest of the powder for my 12 Ga. trap and field loads, where it did much better.

Good luck

I just wanted to add: An old saying, "Just because you can do something, doesn't mean you should do it!"

Not all powders/powders/bullets work well together, my 44-40 load seemed to be the exception, instead of the rule.

Ivan

thanks for the comments will start with hodgons data and work up and down it also seems that the 180gn is quite popular thanks again
angio