At only 300 yards there are dozens of cartridges that will work just fine including the 270 you have. The 300 mags don't start showing any advantage until you start taking 500+ yard shots. You're 270 or a 30-06 would still be good out to around 500.
A 30-06 has been my primary hunting rifle for over 40 years, but if I owned a 270 I'd be just as happy. There isn't enough difference in the 2 to justify owning both.
If you simply must buy another rifle I'd suggest 300 WSM over 300 WM. With the same bullet weights it is 200-250 fps faster than 30-06 and 50-75 fps slower than 300 WM. In equal weight rifles recoil is almost exactly 1/2 way between 30-06 and 300 WM. With the 300 WSM burning 10-12 gr less powder combined with slightly less velocity it makes it noticeably less harsh in recoil.
In my rifles, with my loads, shooting 180 gr bullets my 30-06 generates about 20 ft lbs recoil, a 300 WM about 28 ft lbs and my 300 WSM about 24 ft lbs. I simply don't notice the 4 additional ft lbs of recoil between 30-06 and 300 WSM. And while I can tolerate it, I do notice the additional 8 ft lbs between 30-06 and 300 WM.
No game animal will ever notice the bullet impacting 50 fps slower.
Do what you want, but if I had a 270 that I liked and if it shot well I'd just buy or load quality 150 gr bullets for it and spend the money on something else.
Last edited by JMR40; 01/27/17.
