Is this a 1 in 12 twist or 1 in 9 twist barrel?

I had to send mine back to the company to what was causing the high pressure issues.

Even with factory ammo it did it..Sometimes even blow out the primer....One even
blew the ejector back so hard it ruined the spring...But I hope it isn't gone too long.

I would like to try it at the F class shoots...250 yards is all..I think it would be a good
competeter..I was using 55 gr v max.Until it starting doing wierd things..
One fellow said it was a carbon build up in the chamber....???

One said the barrel was too small...Anyone know how long it might be gone?? Thanks John