A Question For The Ballistics Experts


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texagun
May 23, 2006, 09:12 PM
I have 2 .270 rifles, a Winchester Model 70 and a Sako Finnbear. Both are sighted in to put Remington Express 130 grain factory bullets 2" high and centered at 100 yds. When I try Remington Express 100 grain factory bullets in both rifles, the Winchester Model 70 puts them 1 1/2" high and centered at 100 yards. The Sako puts them 1 1/2" high, but 1 1/2" to the right of center. Is the fact that they print the 100 grainers differently just due to the different barrels? You would think that since both are sighted in to print 130 grainers at the same point, they would also print the 100 grainers to the same point.....but I guess not???:confused:

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R.W.Dale
May 23, 2006, 09:17 PM
There is a lot more to the point of impact equation than just bullet weight and velocity. Barrel harmonics , the length of the recoil pulse , bedding , locktime ect ect. I'm not suprized at all at the result you're getting.

Vern Humphrey
May 23, 2006, 10:01 PM
In fact, this is a very good demonstration of why you should always check your zero when you switch ammunition.

Swampy
May 24, 2006, 07:58 AM
tex,

Plus one all around....

Changing ammo usually means changing zeros. No relationship between different rifles.....

Swampy

Garands forever

owner Swampworks Inc. / JLK Bullets
http://www.swampworks.com

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