When I spent a couple of years doing a lot of experimenting with a Juenke Internal Concentricity Comparator (which used ultrasopund to determine how well jacketed bullets were balanced around their mechanical center), slight variations in length, weight and ogive were far less important than exactly what the machine measured--bullet balance. If the balance wasn't too off-center, then they shot well. If the balance was off-center, they didn't.
This doesn't mean that variations in exterior bullet dimensions don't make a difference in accuracy. They sure, and make a bigger difference in more accurate rifles, and at longer ranges.
But for most of the varmint shooting most of us do, agonizing about minor differences in ogive is like agonizing over whether the local store has our preferred beer. The end result is so close to the same that it doesn't make any practical difference.
