Next Build 22 Cal.

I just bought two barrels myself. I'm doing one in a 22 Creedmoor and one in a 22GT. I'd be interested in your results and load development.
 
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Word of caution I'm shooting 90gr Bergers out of a 7 twist and the other day they started blowing up, (about 500 rounds on the barrel)
I cleaned the barrel to bare steel. I need to take it out again and see if that cured the problem.
Hammers won't have that issue. I shot the frangible 17cal, 18gr Dead Blow Hammer bullet out to 5060 FPS.
Wouldn't even consider project if projectile couldn't handle the velocity.
 
What would/could be the maximum rpm on a cup core bullets then? I guess some might vary between hunting and target bullets?
 
We have a good friend that built a TIGHT chamber 22BR 1:7 shooting 85.5 Berger Hybrids and it is a one hole rifle. He shoots PRS and only loads to 3,100fps. Accuracy and still fairly flat. He is always in the top shooter at matches.
I am sure using a 22BR with heavies would still be good for hunting. He shot the CM , but liked the BR better.
Word of caution I'm shooting 90gr Bergers out of a 7 twist and the other day they started blowing up, (about 500 rounds on the barrel)
I cleaned the barrel to bare steel. I need to take it out again and see if that cured the problem.
What FPS?
 
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