Joel: Your experience with Nosler bullets mirrors my own. They never let me down and I never use anything else on game. My load of choice is the 130 Nosler Part in my .270 WCF. Much as I admire your choice of bullets and much as I respect your experience, sportsmanship and obvious skill, I have no use for the .243 Win for deer hunting.
I have never used one, in large part because of the dismal failures I've seen from this overrated underpowered round when used by other guys who hunted with me over the years. I can recall half a dozen or so really bad experiences of other hunters who used the .243 on mule deer. One of these hunters was my life long friend and compadre who was an incorrigible gun trader. Over his long hunting career, he used just about every modern caliber including the .243 Win, 257 Robts, 25-06 Rem, 7x57 Mauser, 7mm Rem Mag, 30-06 Springfield, .308 Win, and finally he settled on the .300 Win Mag. He got a deal on a beautiful custom rifle in .300 Win Mag and settled on that round because he loved that rifle so much. He was also impressed with the fact that he never had to chase cripples when he used it.
Unfortunately, he also went through the .243 Winchester phase too. Thank God he got over his .243 fever after only one hunting season. We hunted several states together that year. Every deer he shot on three hunts ran off wounded and we spent days tracking them down, sometimes without success. After days of that, I told him to either get a better rifle or find someone else to hunt with. Thank God he took me seriously. He swapped off his .243 at the next gun show. I forget what he got, but it was one of the other, more powerful rounds that he used with such success that left no cripples. This guy was a handloader, an expert hunter, and a great shot. He could (and did) shoot circles around me as a general rule. The only thing I ever had over him was the fact that he never had to help me chase down a cripple because I always used my .270 WCF with Nosler partitions and never succumbed to the temptation to use a .243 Win for mule deer.
The .243 is simply not a reliable deer round. I know there are a cult of guys who love it and who are successful with it, but I have seen too many failures with it to ever rely on it myself. I have noticed that the guys who are successful with the .243 are handloaders who use Nosler partitions and who are expert hunters and shots. Well to each his own.