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I don't hand load, it'll be factory for me.
Doesn't sectional density play a part ?
I don't hand load, it'll be factory for me.
Doesn't sectional density play a part ?
No. In general sectional density is a factor in penetration but with these bullet's design work best with speed.
Let me explain....
Speed is achieved with lighter bullets and it helps the bullet behave to the maximum of its potential according to its intended terminal design that is to leave
as much energy as possible on the target. If you increase the grain you increase penetration but is it really needed? Because if, by increasing grain, you loose
speed then the bullet might not expand to the full size and leave as much energy on the target and even if the speed drops below the ideal speeds you might end
up with pin hole wounding. I had people loose game due to this condition. Lets take the popular 308 winchester for example.
In the smaller cases, lighter 308w solid bullets work much better than the heavier ones. The reason is, the heavy bullets are too long and steal too much case space making
the bullets starting slow already. And with slow I mean not slow for other designs but slow for barnes and other solid designs. If you look a the manufactures specs they give you a
nice threshold but you will find the bullets work better with more speed. so the heavy 308 bullets are really intended for larger calibers and magnums.
Of course things can be tuned with max COAL of chamber, magazine used, barrel length and distance to targets but lets say for the average out of the box
hunting rifle for the average ranges most folks hunt withing 300 yards and w/o getting into specialty stuff. The 150gr might be ideal for 30.06 but not really needed
unless one is going after the largest animals. Again the speed on impact is what matters the most.
Then if you try their 130gr TSX or TTSX in the 308w can put some brutal speed on those so at the average ranges and with animals like deer, mule deer, black bear
pigs, etc... where there is no so much mass as moose or brown bears to start with, the bullet expands better and leaves more energy before it passes through.
The 130gr hits the targets with more energy and on average 300fps higher than the 168gr TSX. They also have less recoil and shoot flatter adding to the benefits
for the average use.
Barnes uses the 130 ttsx to show case fast expansion. Like in many shooting situations less ends up being more in the end. All these facts are available on their website.
Just follow the manufacture's advice and test this and you will be all set.
http://www.barnesbullets.com/wp-content/uploads/2007/02/308WinWeb.pdf
These below would be the 130 ttsx at 100 to 150 yards for maximum effect. A 168gr TSX willl never achieve those speeds not even at the muzzle and will be +/- 600fps slower
at those distances (around 2,300fps) penetrating well but failing to transfer energy and wounding so efficiently. This is from barnes knowledge base / website.
http://www.barnesbullets.com/videos/308 130 TTSX 2906fps 3Gel_WMV9_640x480.wmv
http://www.barnesbullets.com/videos/308 130 TTSX 2912fps 16Gel_WMV9_640x480.wmv
The barrel life reduced with barnes is a myth. One of those online fantasies.