165gr or 168gr TTSX in 300wsm... how much of a lands jump is too much?

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AShorvath

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I am going to work up another load for my sako finnlight 300wsm.

I am very limited with the overall length of the bullet by the magazine. It will only allow me to load a 2.920" round unless I want to load singles (hunting rifle so not an option).

I have a couple boxes of 168gr TTSX's but I have been reading that the 165gr have a shorter ogive to allow for a quicker jump to the lands in a WSM. After getting off the phone with Barnes, I am now aware that the ogive length on the 165gr is .680" and the 168gr is .750" (.070" difference).

With these measurements I will get a .17" jump with the 168gr and a .10" jump with the 165gr.

I like the higher .470 BC of the 168gr vs the 165gr with a .442 but don't want that to be the deciding factor.

Anyone have a large .17" jump that still shoots well?

Andrew
 
Why don't you do some research and find out what kind of accuracy the early Weatherby rifles had?
I never heard of any complaints about them not being accurate.
They were free bored, so the bullet travelled something like .400", before hitting the rifling.
 
I suspect it is more important to find out what shoots best in your rifle. Savages, known for their accuracy have also very long throats. A big jump doesn't necessarily mean a problem.
 
Interesting read about the WSM cartridges and their design.

John Barsness said:
The throat of the .300 Winchester Short Magnum (and the other WSM's) is interesting, mostly because it doesn't exist. The rifling starts right in front of the chamber's neck, which not only keeps overall length of cartridges short enough to fit in a 3.05" magazine, but eliminates any worry about inaccuracy resulting from "bullet jump." This non-existent throat is one reason factory-model WSM's of any caliber tend to shoot very well. (It's also why chambering a WSM in a longer action is mostly a waste of time.
Click to expand...

Go here for the full article.
 
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