You must be looking at a muzzle velocity of about 3,200-3,250FPS. Out at those ranges I would prefer a little more muzzle velocity. At this velocity you will still have 1,300+ ft. # energy @ 400 yards & a velocity of 2,450 & you won't have a penetration problem & you have enough vel. for expansion. So by the numbers (Barnes #2), you can see it will work & is more than marginal.
So with that being the case, why would I say I would prefer more velocity?
Last fall we all used the 125Wildcat in our 25's on Mule Deer & Antelope in WY. & they were amazing. But the year before that my brother used the 100TSX in his Sendero at the velocity stated above, about 3,250. He ran out of time before he found the optimum velocity load & just ran with it. That bullet could easily be pushed to 3,400 in his gun if he had taken more time. My load was the 115TSX at the same velocity as his load. What we saw was the 115 hit much harder at longer ranges, but that would have been offset alot if he had loaded to the vel. it was capable of (26" tubes).
So my point is if you are going to use the light but good bullets at 400 yards like the TSX or Partition, load them as fast as possible. It would
be goofy to say the TSX at 400 yards started at 3,200 is marginal, but we would prefer to see bigger wound channels & a little more dramatic results.
So Sir, there it is, this is what the book says combined with what we experienced.
