Help me choose?!?

[greenecj]

Ok, I'm semi new to this long range hunting but I must say its pretty addicting.
I have shot a sendero 300 rum for that past few years and have killed out to 700.
I'm looking to build a custom rifle for next season, so if u had to choose between a 300 rum or 338 rum or 338 edge to shoot 1200 yards on deer sized game (maybe elk eventually) what would you choose? And why?
If I do the 300 rum I'm stopping the sendero down to the action and starting over. The 338 I'll start new. Either is fine with me

Thanks in advance

 

[WildRose]

The .300 Rum will do everything on your list just fine particularly with a fast twist barrel and throated for the 215-240gr bullets.

Check around but a 1:9 or 1:8.5 would probably be ideal.

 

[FEENIX]

"My" personal preference in order ...

1. .338 EDGE
2. .338 RUM
3. .300 RUM

Why? Because elk is in the mix at 1200 yards. Loaded it with 250/300 grain Bergers and you're golden.