I have this bell carson stock under my 6br rig..But I can not keep a consistent hold on it...(bench shooting) due to back injury...Anyway,I am thinking it maye be my problem,due to being too large for my fat ass......Been thinking about a thinking about a thumb hole stock....Also it has a bull barrel...sort of wish i had stayed with the varmint barrel...anyway..whats your thoughts on those thumb hole stocks..