I'm looking to replace some brass with many loads on them and not seeing the deals i have in the past. typically i find norma on sale and buy a couple boxes but at the nearly $3 a piece i can't justify it. usually they come already loaded for that price. which brings me to the question of once fired brass. if i buy two boxes of nosler/norma 270 wsm and fire form it to my chamber for some trigger practice am i missing out on anything that new brass provides? i've done this in the past with other cartridges and not noticed a downside but i may be using these for load development and want to be certain of my findings before i base decisions off of them. any thoughts on the subject?