52 grains of Imr 4320 with a nosler 200 gr ct has a book speed of 2690. This is of course out of a 24" barrel. Well I loaded the same load in mine that sports a 26" barrel. My question is how much of a velocity increase should I see with the longer barrel? Because the drop chart im putting tigether is showing something that is so high I don't want to say it publicly until I can verify on a chrono.