i have three rifles a cva kodiack , knight krb 7 , and a tc impact, have not shot the tc yet but i shoot the cva and knight all the time cva has a has a average bore not real tight not loose , but the knight has a loose bore cant shoot any thing that is package as easy load i have also notice that the hollow point handgun bullets are more forgiveing with a difference in velocity wether up or down than most of the poly tipped bullets as far as exspansion and acurracy