Ammunition & Hand Loading > Cartridge and Shotshell reloading

Pistol Standard Deviation

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OnTheFly:
I am new to reloading, though I am working with a friend who has done a lot of reloading for precision rifle.  We went to the range and chrono'd several different loads and found that we had a Standard Deviation (SD) of around 30.  However, the accuracy out to 25 yards was, in my amateur opinion, very good.  I was shooting off of a rest at a 6 (or maybe 8?) inch target and I grouped five rounds quite close.  Of course "close" is considering the basic pistol sights, my ability to hold said sights in the same position, and my trigger pull. In the attached photo, the five shots are in a line at lower left from about the 7 to 8 o'clock position.



My friend is used to seeing a much smaller SD, but logic seems to dictate that in a pistol caliber which is normally not shot beyond 25 yards, a larger SD is acceptable. 

What say you pistol reloading experts?  Is my logic sound? Edumacate me.

Fly

bkoenig:
Sounds about right to me.  I shoot for single digit SD in rifles if I can, but for handguns I doubt it wod make much of a difference unless you're doing something like IHMSA silhouettes out to 200 meters.

unfy:
If ya aint got the pistol in a vice then there's just too much movement & play that can come into effect.

Compare all the ammo you load up with some factory and go from there.

OnTheFly:
My reloading friend chrono'd some commercial ammo and he said the SD was much lower. Waiting to hear back from him on how low that number was.

Fly

abbafandr:
Reloading, shooting and statistics :o  May I be excused, Mr Fly, my brain is full :laugh:

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