I've cast my first bullets out of a NOE 287 - 150 FN silhouette four banger that I picked up here several years ago. Didn't look like it has been use much if any. The nose and main diameters look like they are going to work well but when I went to put the Hornady gas checks on the powder coated bullets, they were way too big for the shank to stay on. That's not the end of the world but when run through the .285 sizer, the check could be picked off with my fingernail without a lot of effort. That's not conducive to good accuracy. Is this common with 7mm Hornady checks? I measured a few and they are about .263" inside diameter and my bullet shank is .251-254" which is a touch smaller than the print, but that check would be loose even if the shank hit the .258" dimension at the big end. I'm hesitant to modify a nice mold that seems to be within NOE's callout.
I guess I have two options, modify the mold or find checks that fit better. I can open the mold on the mill or in the lathe without too much trouble. Would a 6.5mm check would fit the shank and still be big enough to function?
https://noebulletmolds.com/site/wp-c..._E5_Sketch.jpg