Noe 230

[Rooter pig]

Do any of you guys shoot the 230 Noe supersonic? 300 bo ar. If yes how about a powder, a ballpark charge and velocity. Not much load data for the heavier bullets supersonic. I should have all suitable powders. Thank you sirs.

[Rooter pig]

I had this bullet shooting pretty good during the summertime. Spacecoast Florida.
Was thinking I had more fps when hot and maybe now I'm to slow to be stable? About the best now is 3 to 4 inches at 25 yards. This pistol will shoot one hole at 25 yards with a cjb. Thanks again.

[Rooter pig]

I have shot this bullet a bunch. Targets saying I am still not stable at 30 yards. Up to 12 grains of 1680 @ 2.2" oal. From .308 up to .3105 Air cooled ww's and water dropped. Any one go up from that powder charge..... Thanks.

[yondering]

Hard to say what's going wrong there, that bullet at that size should be stable. What twist rate is your barrel?

Only other thought is just that your load is probably right in the trans-sonic region; either subsonic or full supersonic above the transonic region is better in theory.

[Rooter pig]

1/7. I will slowly go up on 1680 . Maybe that will do it. Thank you sir.

[Dolomite_Supafly]

Pull one of the bullets and measure the bearing surface. Maybe the case necks are swaging the bullets down to under .308". Had this happen to someone else.

[Rooter pig]

Thank you sir , but they are not. I open the case necks to .309 and have pulled bullets to measure.

[bangbangping]

Are you powder coating? A too thick, uneven powder coat job will do it.

[Rooter pig]

No sir.

[yondering]

You may need to catch some of the bullets and examine the engraved rifling marks on them to determine the issue. Something obviously isn't right.

Just changing your sizing die from .309" to .311" shouldn't cause this, unless your chamber is shaving lead. I can't help but wonder what else also changed.