Strange ammo/snub question

[Eric Larsen]

My SP shoots exactly the POA at 25-45' with hotter defensive loads...125 gr GDots/Federal Hydras etc...very consistantly.
I bought some Fiocchi 142 gr FMJ for plinking and target shooting...fairly reasonable price (cough )
It shot consistantly 3" up and about 2" to the left at the same distance, mainly 25-30 ft and grouped very tightly...5 shots within
1" or so.
I have never had this happen before...most ammo that wont shoot to the POA will be all around it within a small distance.
But this stuff was very consistant, just not where my gun was pointed.....strange.
Has this happened to you.....?
I broke the box up over 2 range trips...same thing.
Shoot well

 

[C.R.Sam]

Muzzle flip and torque.
Faster ammo gets out of the bore before it has flipped and twisted much. Slower slugs get out later.

Recoil is greater with hotter loads but increased velocity makes more difference.

K ?

Sam

 

[Eric Larsen]

Ok...makes sense. So it just happens to be the ammo, combined with the gun and me shooting it.....I get it.
Shoot well