ya know, if it is only a hundred rounds, with a puller of the hammer type and heavy bullets, it isnt so bad. i pulled a hundred heavy crimped 454's and it was alot easier than i thought it would be. that heavy slug pulls out with just a few wacks, far easier than rifle ammo.
i also experienced that problem with my f.a.. loved the gun, but that tight throated bugger was a real pita getting my cast bullets to fit consistantly. i have been there, done that. and it does grind on ya. my advise is pull the bullets, and resize them. i would use a .429 sizing die, and my bullets would spring back to .431 dia and wouldnt fit. that cyclinder would NOT take a bullet that was more than .4295.
i committed the mistake you did twice, but i did check the first five to make sure they fit. when they did, i was off to the races making ammo. i made up 600 rounds, only to find that about half of them would not fit. good thing for me i have more than one 44. the next time i loaded, io check the first ten rounds, no problems, off the races i went again. approximately half the rounds i loaded would fit. so there i sat again, going through all those rounds one by one to see if they would fit in the cylinder.
now a smarter man than me would have gotten yet another sizing die, probably a 428 to eliminate the problem, but it was getting to be a whole lot of messing around for not much gain. i ended up trading a guy for a smith 629 and money to make up the difference in value for the f.a., and i havent looked back. there are times i miss that gun, but it sure is nice when all my bullets fall into that cylinder with no b.s.. truth be told, the barrel length on that gun was more of a reason for me to trade it, but the hassle was just the excuse i needed. there will be another f.a. in my future, but it will have a shorter barrel on it than the one i had.