i have done a fair amount of neck sizing with my .223 Handi'; but have to keep an eye on it because it eventually allows the brass to expand to where it can be tougher to chamber or extract. a good alternative - some say - is to do the partial-length re-sizing using a full-length die that is unscrewed a little at a time to see how far out one can go before the (previously-fired) rounds don't want to rechamber. some don't care for it, but the principle makes sense to me. i just don't remember doing too much partial-length sizing, because i haven't lost that much brass to full-length resizing like some claim.
i think that the lubricant i use, Mobil-1 in 5w-30 or heavier, has allowed me to achieve a longer case life through less stretching of the brass. then too, i polish the expander balls in my dies with a 600 grit wet/dry machinists paper to eliminate drag on the ball against the case neck. i lube the inside of the case necks with the Mobil-1 and wash it all off in very hot water with Ajaz Lemon dish soap.
ss'
