I got back into big game hunting about 5 years ago, and decided to have my great-grandfather's 1952 Model 70 30-06 refinished and use that as my elk rifle. It shoots 180 Accubounds at just under an inches at 100 yds with 57g of H4350, 2760 FPS.
I shot my first bull at 450 yds. Hit him twice. Both pass throughs. A little high and far back so, not the widest part of the body for penetration, but he went down quick and it worked fine.
Got a 2nd bull this year with the same load. About a 70 yd shot on the run. Hit him twice. High shoulder and neck. Both pass-throughs.
My only concern with it as an elk gun is that it starts to run out of steam at around 500 yds. I was only comfortable shooting at 450 yds with a rangefinder and my Leupold CDS dial, given the trajectory at that distance. Not that I would shoot much further than that anyways, but some areas I hunt where that would be nice. I did start playing around with the 190 ABLR and initial loads look promising. I will play around more with those in the spring and maybe I can squeak out another 100 yds or range with it.
The 30-06 has about as much recoil that I feel I can shoot comfortably without a break. Shooting a box of the 180g loads at the range isn't fun, but I feel good shooting it accurately as a hunting rifle. I can't say that I have shot a 300 MW, but not sure I want to take that step up. Have thought about a 300 WSM as middle ground. I just don't want to mess with a break, and have just accepted that I will stick with whatever I can shoot accurately without one, and the 30-06 seems to fit that well.
Another shot of the gun after I had it refinished.
