straight wall rimmed cases like a 44 mag not so much 44 specials but deffinately magnums need to be checked for case length, even factory fresh brass should be checked ive noticed a varience in length as much as .003 on factory fresh brass, thats enough of a difference to effect your crimp.

with my 44 mags and 357 mags after firing ive noticed them to grow asmuch as .002 to .007 from just being fired once depending how hot I loaded them or brand of case. its always wise to check case length. just add it in as a step as your case prepping, i check and sort my cases while watching tv. its a simple task I think you will be amazed just how much a case grows from firing. good luck