Quote:
Does anyone have a load or know where I can find a one ounce .410 load ?

Not trying to be faceitious, but; take a 2½" case, prime it, drop the shot & crimp.
1 oz of shot in a .410" case will have a column length of approximately 2". Subtract base wad ht & crimp depth, & that's about what you have left.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra