Re: 30-06 versus 300wsm
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">Yes it is. When you combine the 7mm with the '06 case, you get the .280 Rem. Still early in the .280 project, but I'm liking it more and more.
Greg </div></div>
Ballistically yes, although, but the 280 Rem shoulder is 0.051" further forward than the 270 and 30-06.
The 270 and 280 share a 2.540 trim length. I found this out after I inadvertently held my 280 reamer short and headspaced it with the 06 gauge, causing me to end up with a 7mm-270 instead of a 280. I forgot to bring 280 ammo with me and grabbed a 270 case from my dad's bench and made a dummy round to double check the headspace gauge. When I got home, no 280's would chamber... stupid mistake, but since I planned to reload for it exclusively anyway, it's not that big of a deal. BTW, I have 249 pieces of NIB 280 brass if you're interested.
Back to the OP-
I load 300 WSM for a friend and I have a 30-06 myself. The WSM capacity is slightly higher, for 178 Amax's (he doesn't shoot the 208's) his case uses 4 more grains of powder and gets about 50 fps faster than my rifle does.
If you're going to build a 300 WSM, I'd build it on a long action to fully utilize the extra capacity. WSM brass is built like a tank, and Winchester makes good brass.
I would personally take the 30-06 over the 300 for 3 primary reasons
1) Brass is easy to find both at stores and people leave it on the range routinely, so plinking cases are plentiful
2) Probably the largest selection of hunting ammo exists for 30-06 and 308. If you're out on a hunting trip and something terrible happens with your ammo, you can drive to the closest hardware store, gas station (where legal) or gun shop and they're almost guaranteed to have some form of serviceable 30-06 ammo on the shelf.
3) You can get Lapua 30-06 cases if you want them, you can't get Lapua 300 WSM brass.
A few more things:
7mm is definitely the way to go if you're going to reload and go for long range shooting. The 180gr Berger Hybrid VLD's have a better BC than the 250 SMK in 338, with velocities at 3000fps or more (barrel length dependent) you will actually have a flatter shooting rifle to a mile than a 338 LM if built to certain criteria.
The recoil from a 7mm is less than the 30's, and there's only 1 bullet in 30 caliber that can keep up with a 180gr 7mm VLD from JLK, Berger or the Berger Hybrid. The 240 SMK, which is pretty heavy for either of those cases adn can't be driven to nearly the same velocity.