Glad to see we have another 25-06 fan!
As for deer hunting with the 25-06, I have killed several deer in upper Michigan with my Marlin and Ruger #1 rifles. Simly stated, the 25-06 is fantatsic for shooting those whitetails.
As for bullet choice, here is my 2 cents. I shoot Speers 87 grain TNT bullet and have never lost a deer. In fact, I have never had a deer move. I will admit, the shots were all made within 100 yards and all the shots were perfect kill shots.
I agree with Doesniper in that the Barnes triple shock bullet would work well for shooting long range and delivering much energy on impact. However, I would not be afraid to still use my 87 grain TNT Speer bullet either. Rather on worrying about so much the bullet, instead focus on the "kill zone" of the deer. If you make proper bullet placement, that deer will drop.
I read way too many articles about different bullets, guns, socpes, etc and few too many articles expressing that proper bullet placement is the key to hunting. This means, one has to spend a lot of time at the range shooting 200,300,400 or 500 yards to see how the gun will work.
Where a superior bullet comes into play is when a hunter does not get that proper bullet placement shot. When you do not get that heart, lung or head shot, you will need a bullet that will do the most damage as possible.
In closing, I would suggest using a bullet (since you reload) that will fly the best out at 300 yards. If you can only get a 4 inch group at 300 yards with a Barnes triple shock, but a 2 1/2 group with the 85 grain Nosler.........go with the Nosler.
I am just happy to see another 25-06 fan is all. I just love the round. I own a Marlin (beautiful rifle for the money, but no longer made
), Ruger #1 in stainless, Sake Deluxe left handed (no longer made, still new in box) and a custom rifle I had made up by Ahlman's in Minnesota.....
Happy hunting,
Kenny