Well I would think both .308 or .30-06 a bit much for roe deer. But then again where you hit them matters and one could use controlled-expansion bullets and punch them right through (as you mention as well). Or one could use very light bullets or smaller caliber with light bullets.
Out here in Alberta, I think .308 is very popular but 30-06 probably has an edge. I think .270, .300/.338WM are up there as well. I know and meet more hunters with these 4 calibers than anything else. Though some of the new calibers are now starting to creep in the mix. 6.5 creed on the low end and some of the RUM and Nosler cartridges on the heavier hitting side.
Out here in Alberta, I think .308 is very popular but 30-06 probably has an edge. I think .270, .300/.338WM are up there as well. I know and meet more hunters with these 4 calibers than anything else. Though some of the new calibers are now starting to creep in the mix. 6.5 creed on the low end and some of the RUM and Nosler cartridges on the heavier hitting side.