whttale
The is certainly rated for 150 grains and depending on what CVA you shooting it too could be rated for a 150 grains of pellet power. 150 grains of T7 pellet power is certainly different than 150 grains of loose T7.
The Spanish barrel issue is an issue and an issue that you or anyone elsethat shoots a CVAhas to deal with. The bestthing to do is to follow the manufactures recommendation on the size of loads and the size ofprojectiles that can be used.
I know a lot of people use the 150 grain load but I can not for the life of me figure out why. There are few people more conscious of the trajectory and velocity than I - not that is wrong - I should say I am very understanding of the importance of trajectory and velocity and I have beenreally happy with the performance of 100/110 grain load of a T7. i see know need for the 150 grain load.
As Cayugad indicated one of the most common problems with 150 grain loads is accuracy... In most (not all) accuracy begins to fade @ 120 grains.