Ive shot several bottles of 209 out of Optima V2 LR using CCI 209m primers and have had no issues whatsoever. I also use the 209 breech plug..Outside of being crazy expensive 209 is awesome stuff..However, I watch the wally worlds in my area this time of year and buy when they clearance the stuff. Last year I bought 2 bottles at one wally world for 9 dollars per and 3 more at another for 13 dollars per!! Been looking this year so far and have nothing on clearance yet!!