90g Berger VLD's tumbling in a 6.5 twist barrel after some time ????

[r bose]

I Shot 90g Berger VLD's and 80g Sierra's yesterday. With the 90's using 23.5g R-15 at 200 yards I shot 2- 5 shot groups measuring .957" tall and .777 wide. Did this twice with 10 rounds. Groups were almost identical in size with no signs of bullets destabilizing.

The 80 sierra's went into 5 shot groups tighter than the 90's measuring .567 tall and .742 wide. This again was 2-5 shot groups. No destabilization. Hard to believe I'm dealing with a shot out barrel????

I'm gonna shoot the 80's 2 strings and the 90's 1 string at 600 tomorrow. Perhaps at 600 yds my problem will show itself again. But at 200 yds the gun still hammers.

 

[daniel brothers]

Well... what is the update...?

 

[r bose]

Been a little busy lately but I did shoot the 80 Sierra's at 600 and they shot great. Held about 4-5 inches vertical at 600 yds and with the exception of some poor wind calls, I could have scored very well.

Looks like the barrel just don't want to shoot 90's any more.