The target SD's are interesting but not a reliable source of info then.. It was worth me asking the question..!! There is so much more info on accurate shooter than you find over here.. It's a wealth of info.. I think my 1 in 8.25 barrel has a .220 freebore so probaly not long enough for the 190s.. I've 1500 of the 184s to use up first anyway.. As this coronavirus is beginning to stop big gathering of people these bullets may last quite a while the way it's heading .