This may be a poor question, But I pulled the bullets from 50 loaded 223 so that I could change the charge. I did not resize the case before reseating. Will this cause me any issues? Thanks
Push the bullet against the edge of your bench if it doesn't move or at least doesn't move easily you are good. If it moves, well you'll know what to do.
If its a bolt action, you SHOULD be fine.
If it is a gas gun, when the bolt slams the round intro the chamber you will have
an automatic kinetic bullet puller.
If you pull the bullets resize the neck, a bullet pushed into the case neck works like a expander.
Should be fine. If the necks are work hardened, you may see accuracy issues, which you'd likely see anyway. I've pulled and reseated with the puller w/o noticeable issues.