luckyned, I haven't seen the bullets from Sierra in question. I have enountered "too long" bullets for my Smith .44 and my Ruger SBH. You don't specify which Ruger.
Also, I'm puzzled about the statement that the bullets are "too long for the data" A cartridge might be too long to chamber--my problem with some long .44 bullets when seated properly, but "too long for the data" puzzles me.
If a bullet is seated deeper into the case than normal, it can cause sudden and dramatic, often dangerous, pressure rises. Is that what he means? If they are crimped "in the groove" (I assume you mean bullet cannelure), how is he determining that they are too long. Is he measuring overall length?
Traditionally, bullets are crimped in the cannelure, so we might assume that Sierra placed it in the right place. But, actually, we need more data to really discern the problem.
Sierra has techs available with very generous phone hours at their 800 number. I'd give them a call. I'm sure they can tell you what's up. I'm also sure they'll want to get you fixed up on this.