weatherby 270 ammo

[shootdonniebrook]

I have a thompson encore with a VVCG barrel chambered for the 270 weatherby mag. I only shoot factory ammo, and last year i shot a buck at 75 yards behind the shoulders and it ran 80 yards or so and fell. The entrance and exit hole were very small. I was shooting the 140gr. ballistic tip. As far as factory ammo, what will cause the most damage and largest entrance and exit hole.Weatherby offers a
      130gr. sp
      130gr. partition
      140gr. ballistic tip
      140gr. barnes x
      150gr. sp
      150gr. partition
     I believe the sp= hornady spiral point. Will the lighter bullets do more damage due to the increased speed or does the heavy bullets do more damage?

[Lone Star]

IME the 140 Ballistic Tip.  These bullets are know to be relatively soft and open up well.  Forget the exit hole, how did the body cavity look on your deer?  It is possible that only the core or jacket exited after blowing up in the body cavity.  "Behind the shoulders" is a very large area - just which organs were damaged by the shot?  It is not uncommon for well-hit deer to run a considerable distance.  Those who say that all their deer always drop at the shot either haven't shot many deer, use more powerful rifles, or neck shoot.

[Hcliff]

Don't think about the exit or entrance wound size a a matter of bullet performance.  The hide stretches alot.  The internal damage is what you care about.  Also how you shoot.  Do you like shoulder shots or behind shoulder shots?  If you hit bone you want a shouter bullet.  A good way to test bullets is to shoot them into wet news print.  This will give you a wound channel to look at and alot a measurement of penetration.  I personally love X bullets and partitions.  Always get good exit wounds and losts of internal damage.  Also it depends on the deer if it was excited it can be "dead"  and go a distance.  I shot a doe with a shot gun slug (Regular lead style)  and the deer ran 75 yards and tried to cross a river.  It had massive internal damage, the exit would yoiu could put you fist through and the only think would would touch would be a rib bone.

Hcliff

[Castaway]

You can never go wrong with a Nosler Partition.  It is still the standard by which all other jacketed bullets are judged.  Personally, I'd go with the 150 grainer as the WBY can accelerate it quite easily.  Expect to loose about 30% of the mass if you ever do recover a bullet.  The part that's left mushrooms beautifully and drives forward while the other 30% acts as small missiles in all directions in the boiler room causing additional trauma.