Bizarre ammo accuracy issue

[Wolkenflieger]

Sure. OP is using 6.5CM. You suggested Super Vel. Super Vel doesn't make 6.5CM

Good point, I didnt even notice that. Thanks for the correction.

 

[xrMike]

In the picture it looks like the bullets are starting to tumble. In my case there was no evidence of tumbling, just horrible accuracy.

Agreed. The shots circled in red look like those bullets were starting to tumble off-axis.

Usually that's a "barrel twist vs. bullet weight" incompatibility. But I am no expert.