I've seen a lot of "lot# to lot#" variation with the CoreLokts.
Remember, that Remington makes "millions" of these things. Often, the bulk bullets we reloaders get from Remington are the "culls" or "blems" such that that Hornady often dumps at cut rate prices, rather than passing off as "first quality" products like Remington sometimes does.
I've seen some .30/30 150gr CoreLokt Round-Noses that due to a mis-function of the core ejector pin were "hollow pointed". But not all in a single box..... Occasionally, you'll even get a "boo-boo" that got passed the q.c. inspector. ie: no jacket, or jacket with no core......
Sometimes, you'll have a lead smear running done the ogive from excessive lead extruding from the jacket.....
I've currently got a batch of .308 180gr Corlokts that are the most accurate bullet for my .30/06 and .300Rum.
I've also got a box of .257" 100gr that won't group inside 3" from my .257Roberts (x2) and .257wby. Definitely not a single rifle "disliking" the bullets. But I've had some other boxes that were easily sub-moa from all three rifles......
You can "weigh" individual bullets and sometimes by seperating them, you can get the "flyers" out of the "good" bullets. Sometimes, not.