so I was missing some thing basic! I just started reloading for my .22-250 have only done 19 rounds so far. still alot to learn. looking at advertised round dimensions and then seeing the actual numbers an experienced reloader see's and understands had me confused. I want to get good at it and load all my own eventually. Once I get the .450 I'll be loading for it after I generated some empty factory shell's.
When I was looking at bullets I saw that there we're .451 and .452 wasn't sure what the difference was...