All good...I load my 270 with different pills and charges so that one has similar ballistics to 25-06 and the other similar to 257 roberts. Still can crank a std 130gr load and they are all in line with the bob type load 2.5 inches lower.
Get something and shoot it heaps and play with loads if its of interest.
Spot on munsey. I bought my 270 for cheeeap as no one wants them.
Narrative. "270s are shit" suits me fine.
I have had a .25-06 for over 10 years and load my own, so have a good feel for what it can and can't do. For large deer I can think of probably 20 chamberings that are far more suitable at those ranges. Unless the barrel is at least 24", and ideally longer, I wouldn't recommend it beyond 250m.
Of the two you mention I'd pick the .270 at the drop of a hat.
If you are not set on one of the two, I'd pick neither, and .243 is a far from ideal deer chambering too.
Meant to say that my .25-06 is becoming a .284 Win shortly as I have a new 7-08 barrel for it. I used it for muntjac and roe deer in the UK, which it was superb for, but too little gun for fallow and definitely red, hence the change.
If you look at all these calibre's ballistics they are so close it's not really a choice of whether they'll do the job (at normal, ethical hunting distances) but more of what's readily available (pills wise) and whether your rifle will spit them out in a nice tight group. Then it's just a matter of putting that bullet where it needs to go. In my experience there is a bit more choice out there for .270 calibre loads and projectiles than .25/06 (for which the heaviest readily available pills are usually 120gr) But, the .25 kicks/jumps a bit less than the 270 (unsuppressed rifles) so if you hate recoil, maybe go 25/06. You can't go too far wrong with either.