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B I have tried .218 and .217 at different speeds but this is what the worked best for me, i have a 800mm tensioned barrel and tried more...
B I think 33grain is sufficient to do that, i have also a drs 700 pro and try 40 grain but i have only 8 shots per fill. Whit 33 grain...
B I use .217 40 grain in my m4 at a speed of 984 feet per second with sub moa results at 150 meter or 165 yards
