POI change/barrel harmoics.

[Kelly Timoffee]

Been seeing a few threads where shooters and reloaders have been concerned about POI changes between bullets of same weight but different manufacturer, and other variables.I think the last one was a change between some Barnes and some factory Federal that the fellows were concerned about, a 3" POI change.

http://www.canadiangunnutz.com/forum/showthread.php?t=703246

I was looking through my pictures and figured I'd show two pictures of targets that demonstrated this to show that they aren't the only ones and things can go even stranger.

The top photo is 168gr VLD's(velocities were 2588,2603,2616 but not on target)

Bottom photo is 168 SMK's

These were done with the same zero on the rifle.So even within the bullet weight the different harmonics do not even seem to behave similarly between manufacturers.

Some ARE changing POI but some are not changing POI but group size.

Just wanted to throw this out there for the others.

 

[ATOM]

Bottom centre - is that a flyer at 8 o'clock or did you actually put five into that hole? Very impressive, either way.

 

[Kelly Timoffee]

It was movement in the rest/bag , I just followed through with my shot, so it actually didn't turn out so bad.I count those too, but the group still showed me what I wanted to see.

Bottom centre - is that a flyer at 8 o'clock or did you actually put five into that hole? Very impressive, either way.

 

[ATOM]

Which means that, if you'd done your part, it would've been one ragged hole. Wish I could do as well on anything approaching a regular basis. Damned fine load, that.