What do you plan to fire them from? AR? Bolt gun? Handi Rifle?

I can't remember the mold number, but my dad has an accurate mold he uses for a .30-06 bolt action. I made some .300 dummies of that 175is grain boolit and couldn't get them to feed in my AR.

I haven't modified my feed ramps, but I see online where some have to accommodate a wider meplat boolit.