I'm a stupid rookie...

Everybody makes mistakes like that when starting out! I haven't read all the posts so far but try some redding imperial wax and if it's possible, get somebody you know that's an experienced reloader to check some loaded rounds for Concentricity incase you bent your expander ball out of line.
 
Thanks for the support guys. I've decided that I won't be using this one-shot crap anymore. I had 3 stuck cases in the new die this afternoon while using the stuff, even shaking the can like crazy for each case. I made a stuck case removal tool out of a $20 tap and die set from princess auto, and $3 worth of nuts, washers and a bolt from home hardware. Actually works great.

I'll take a look for some of this imperial resizing wax in town, if I can't find it any other suggestions?

Anyways, first magazine's worth came out of the press today.

IMG_1033.jpg

.300 Winchester Magnum
180gr Hornady SST's
70gr IMR4831
 
Ummmm.....not to be picky or nothing but it looks like you are seating the projectile at the bottom of the cannelure. You may want to try seating the projectile in the center of the cannelure instead, you'll probably get a better crimp. Having said that, seating so that the projectile is just short of the rifling lands is conducive to greater accuracy, so if that is what you are doing, then carry on.
 
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