This thread sure has generated in the last few pages. There are some decent folk who come and look at this thread for guidance, often sharing their own valuable experiences and look what they have to put up with. Some of you aren't really acting like men are you? Anyway, to bring us back on track as this is a thread on the .270, this is what I suggest based on what everyone has contributed.
For a lightweight hunting rifle in open country shooting up to around 300 yds and perhaps stretching it to 350 yds with a bit of hold-over the optimal cartridges for a light rifle without too much recoil and muzzle blast are:
Deer and other game up to about 200 lbs - large 6mm or .25-06
Deer and other game from 150 lbs to 400 lbs - .270 with either 130 or 140 grain (my preference) projectiles
larger deer and other game starting from 350 lbs including elk, moose - .280 RCBS Improved with 150 or 160 grain projectiles, 2nd choice 7RM with 150 or 160 grains
target shooting out further 6.5 CM with match projectiles
