I've been working up a load in .5 grain increments and have found a sweet spot. I am left with rounds with more or less powder than the optimum amount. I have a collet puller and plan to pull the bullets from these rounds. I will empty the powder out and reuse it.
My question is; do I need to resize the neck of the cases before I reload them? My instinct is that seating a bullet in the neck must expand it, hence it would be best to resize the neck only before re-seating. However, various threads on other forums and a very experienced reloader / mentor (whose opinion I value very highly) have said there's no need to resize.
I'd be grateful for your views.
Also, assuming I do resize, is this safe to do with a primer in place (but no powder in the case).
Thanks for your help.