Hi!! I have standard savage FP 10 in caliber.308 Win.I have chage to a MCM stock and want to reduce some weight in the heavy barrel. I cant find anything about what is the ultimate lenght of this caliber.. I have seen that some "tactical rifle" has a 18"-26" barrels ... Pleade can anyone explane to me and helt me..?? Many thanks... Wiktor "a beginner"