Originally Posted by AZShooter
Was reading along and suddenly saw that I contributed to this two years ago!
I got that cow elk with the 338 RCM I had recently built back then. It was 140 yd shot through chest, the 225 accubond exited. The cow was next to the private land fence and was about to jump. After the shot it looked like it still might try so I put a second one through the base of the neck. Very happy with the package. A joy to carry.
Just thought I'd mention the following as you were originally pondering the 338-300 WSM. Just a few weeks ago a friend had me work up a LR elk load for his very light Browning A-bolt in 300 WSM. I had some 230 gr Berger target hybrids and for grins thought I'd give them a try. The bullets are seated to feed from this short action with the bullet seated VERY deeply in the case. RL-17 has the bullet moving at 2725 fps and it is accurate. Why bother with the 338-300 WSM if you could get a 215 or the 230 hybrid to shoot? Look at what Broz has done with those bullets, perfect elk medicine.
I fully agree that a 338-300wsm is NOT a long range setup. It lacks the raw horsepower to push a heavy high b.c. 338 bullet fast enough to make it lethal at long range. I think everything that AZShooter says is right on that a 300wsm with heavy bergers will do a better job at long range than a 338-300wsm wildcat. And in the end is more versatile since it's 30 cal and you can get a factory rifle and standard dies.
With that said, for those of us that like to tinker, a 338-300wsm wildcat is just fun. I love .338 caliber for elk hunting and I think this wildcat is just about the perfect timber gun. And still is very viable for medium range shots maxing out around 700 yards.
I built my rifle around a Win M70 Extreme Weather rifle. The M70 short action is a bit longer than the remington short action, and I can seat Accubonds and Barnes TTSX .020 away from the lands and still fit in my magazine box. The barrel is a Pac-Nor 24" ultralight contour. Glass bedded the action. And I am actually very happy with the factory Winchester "MOA" trigger. 2.75 lbs at its lightest setting with a very crisp break. For optics I originally mounted a Leupold VX3 3.5-10x40 w/ talley lightweight rings. Fully outfitted with sling/bullets, the rifle weighed just under 7.5 pounds.
I can shoot the 250 Accubond accurately @ 2715 fps w/ RL-17. Over 4000 ft*lbs of energy is a whole lot in a 7.5 lb package. I think that beats a .30 cal 230 hybrid up close, although I admit either load would work great. Nobody can argue with Broz' tried and true results, near and far, with a berger.
My favorite and most accurate hunting load for the gun is a 210 TTSX seated -.050 from the lands over 68.5 grains of H4350. I was able to push the bullet over 2900 with a max load, they just were not as accurate. I am able to shoot 1/2 moa (and often times better) out to 700 yards. Since the gun has turned out to be such a shooter, I replaced the leupold with a Vortex Viper PST 4-16x50. Added about 10 ounces to the setup but I think it was worth it. The 50mm objective gathers more light in the dark forests plus has the illuminated reticle. And I was able to reach out to 630 yards to drop a very nice bull on opening morning this year.
In the end I would have saved money had I gone with a 300wsm. But I would have been lucky to buy a factory rifle with the kind of accuracy I am getting out of the pac-nor barrel. And I have had a whole lot of fun with the wildcat.