Yup. It depends upon the task at hand.
Overall, however I would prefer the heavier weight over the lighter for long distances simply because it is easier to adjust for elevation than windage. Recoil and whatnot can be compensated for mechanically. As for penetration, this is also adjustable depending upon intended purpose (IE: jacketed bullet as opposed to straight lead, hollow-point as opposed to pointed tip bullet, etc.).
Yep Black leaf, and if they keep trying, some day they will be as good as Canadians.
In 2002, a Canadian sniper, using a rifle chambered in .50 BMG (which makes the 8.59mm look like an air rifle) killed a Taliban fighter from the astounding range of 2430 meters.
That is the undisputed longest range kill ever made by a man with a rifle.
PPCLI snipers were so feared in Afghanistan that they won Canada a top rating in bin Laden's hate list.
Edited to say: I see this is mentioned in the link above to Carlos Hathcock, the USMC sniper of renown. I read his book.....
A honour, I might add.
Here is a new target for the boys in Manitoba. They say it can spot movement at 10 km, so they better lay still as it approachs.
U.S. set to launch unmanned aerial drones to monitor Manitoba border