How does this happen?
- Thread starter bullseye308
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Ohen Cepel
Member
Where they all sized correctly? Sized before or after coating? That would be my first guess, sizing issue.
They all cycled correctly?
They all cycled correctly?
rbernie
Contributing Member
If the coating separates in-flight, as it were,, it will destabilize the bullet.
JJFitch
Member
Undersized bullet or over crimped bullets! 
I cast .358, size to .357. Stopped tumbling in 9mm Kart barrel.
I cast .358, size to .357. Stopped tumbling in 9mm Kart barrel.
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OP
OP
bullseye308
Member
Not really sure. All cast at the same time, then sized, then coated and sized again. All of them loaded on a single stage and powder weighed out in a Hornady electronic powder dispenser. I have had a couple tumble out of an 8” barreled AR-9, and a Glock 17 gen 3, and a time or 2 from one of my Range Officers. What’s weird is they were still fairly accurate.
OP
OP
bullseye308
Member
No problems with the coating coming off, I only crimp enough to remove the flair, and all are midrange charges. I load for accuracy, not speed. The only thing I can think of is one of the kids were helping with the sizing and maybe missed a few.
243winxb
Member
Shoot at 25 or 50 yards, they may ALL tumble?
After all they are "Tumble" bullets.
I would guess , caused by skidding. Alloy to soft. Diameter undersize?
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243winxb
Member
The Missouri Bullet is 18 BHN and has a large bearing surface. No lube grooves.
The Lee tumble would seem to have a lot less bearing surface?
If its not skidding, could the velocity be to low? Very light target load?
The Lee tumble would seem to have a lot less bearing surface?
If its not skidding, could the velocity be to low? Very light target load?
FROGO207
Member
You using all the same headstamp brass? Might be case wall thickness issues causing different neck tensions.
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