Funny you should mention that. The load that he has been shooting in it for 20 years is a factory federal 150gr RN which has a BC of .261. I will say that bullet is legitimately very very terminally effective at our normal 75 yard hunting ranges as you would expect from a round nose soft point, but you can see that noticably degrade even at 150. Well anyway he once shot a buck at a known distance of 400 yards with it by just holding at the top of its back and letting her fly. Ever since that day he never stops talking about it, and credit where credit is due it was an amazing shot especially since he had no idea what the drop should be at that range. Here is the kicker though. If you do the ballistics math on that load which is right at 2800 fps muzzle, and 1.5" high at 100 zero, he should be 32" low at that distance, so basically there is now way he had enough hold over for that distance and he should have shot under it, but luckily he must have pulled the shot high and made the hit.
Now the funny thing is he has often told me my 25-06 is underpowered and is only suitable for 100 yards or less, but if you also do the math for both guns mine has more energy at like 80 yards and at 400 yards mine has nearly twice the energy.