str8:
Well, I don't have my ballistic program on this computer, so I can't give you specifics regarding the energy of a 115 grain bullet traveling at reduced speed at 400 or 500 yards. But, I'm pretty sure it's "leaking energy" quite badly at those ranges. You get all kinds of arguments about minimum energy (measured in foot-lbs) a bullet should have at a particular range to make a clean kill on a deer-sized animal. But the .25-06 really suffers, energy-wise, when it travels beyond 350 yards.
Not saying you or others haven't made kills on deer at 400 yards plus. Just that it isn't, in my opinion, something people should try to do on a regular basis. Particularly since the chance of hitting the deer in the "boiler room" at 450 yards is pretty slim.
I live in Tulsa and have access to one of the best gun clubs in the nation - Red Castle, located on Skiatook Lake northwest of the city. In addition to a very good bench rest range - featuring both 100 and 200 yard targets - it has a high-powered rifle silhouette range. The silhouette range has made me understand the vagaries of long-range shooting far better than the study of ballistics.
The high-power rifle silhouette range is set up so that you are shooting chicken silhouettes at 200 meters (220 yards), pigs at 300 meters (300 yards), turkeys at 385 meters (400 yards), and rams at 500 meters (550 yards).
Anyone who’s shooting a tuned .25-06 (or other caliber) can readily hit the chickens and pigs. Drop and drift cause the turkeys to be more problematic. And the rams, which are about three feet high at the shoulders, are downright hard to hit, since the drop is so extreme that one must aim 40 or 50 inches, perhaps more, over the back of the target. And a relatively mild crosswind can have a very big effect on such a light bullet, particularly as it slows at the longer range.
The silhouettes are cut from 1/4 or 3/8 inch steel and are free standing on pieces of railroad rail. So, when they’re hit, they fall off the rail.
I’m amazed at how many times I’ve hit the rams, which must weigh about 25 or 30 pounds, and they don’t fall. Since the distance is so great (550 yards), I usually have time to refocus on the target after I fire and can see the black dot suddenly appear when the target is hit (the targets are spray painted each day so that shooters can see where the bullets impact). Then, a second or two later, I hear the sound of the bullet impacting the target. But, the target remains standing. And, unlike you, I use the 115 grain Barnes X, which retains more energy beyond 350 yards than your 100 grain Ballistic Tip.
Like I say, killing deer at 400 yards or more with a .25-06 is possible, but, in my opinion, it’s akin to shooting them at 200 yards with a .22-250. It’ll work, if the shot is placed in just the right spot, but not something to count on.
[This message has been edited by Hap (edited 1/9/2006 3:27p).]