I would just drop down to 22x47 lapua or even a 22-250 or a 220 swift. There is only so much you can do with the 90s despite the superior BC. Damn things blow up at extreme velocities, even in 5 groove barrels. I have been playing with the 22x47 for a couple years now, great round for me because I have so much 6.5x47 brass that has already been necked to 6mm laying around. I cannot get the 90 bergers to hold together with a 7.5 twist much past 3200. I cannot get them to stabilize in an 8 twist even running them 3350. There is just not much room for improvement of the standards when it comes to long range 22s. The bullets not the cases are the limiting factors. BTW I have never blown up a 80 SMK....yet, so as an aside maybe there are some other things to try.
Last edited by EddyBo; 04/23/10.
