Mike,

Happy belated birthday!

I have been mulling over this data for a while now. In that mulling, I went back to the image of the fired brass and noticed a couple of things.



The only signs of cratering appear to be the 5th round of 4756, #1, #3 and #5 of Longshot and N340. There's also a flattened primer, #2, with HS-6 that just about fills the primer pocket. None of this would be a concern to me, due to how minor most of it is, except the HS-6 load where there is a lesser degree of flattening on the remaining cartridges.

Since I have sold my only 2", I don't have the means to try any of these loads in anything less than a 4" barrel.