I've used them in 2 different PRC barrels, one being a 26" 9 twist Bartlein running about 2900-2910, and the other being a 27" 8 twist Bartlein running about 2950.
Zero issues with either one.
A good friend of mine is running both the 230's and 250's in an 8 twist, 27" Norma around the 3k...