FNG......Retired Army....and in my work i have shot and taught everything from 9mm - 81mm Mortar - .M2 50 Cal to 106 mm Recoilless Rifle...yes i passed the pile test.....big time deer hunter (Hunt every year in Montana) and very particular with equipment. I am from the old school ethic that "Only accurate guns are interesting" .Nosler trophy grade rifle, Accurized at Hill Country Rifle, .270 Win, Nosler 130 gr Accubond, SWARO Z3, .. Carrying an AR for 23 years in my day job, i never saw the requirement for privately owning one until Ferguson, Missouri.....At that point, I amended my METL and obtained an M4 (Colt Upper, Anderson lower) ... I had been been shooting iron sights until recently...when a I could no longer obtain the laser focus clarity necessary of the front sight post.. I did some research and bought a Vortex Spitfire 3x. Iron sights have heretofore given great performance....good groups...ACCURACY. So now i mount the Vortex...obtain good groups 25...50 ...when i move it out to 100.... it's high with a good group. Too high. I devine it's the mount....it's too high with the accompanying riser.....so i remove the riser and remount.....went to range....50 yds...no group.....all over....tried several times....NO GROUP....rest was excellent...my technique was ON...still no group.....Houston we have a problem. My approach is to always mount an optic low to barrel....i have always been umbilically attached to that concept. On this M4 platform that may be wrong but that in itself does not explain no groups...So at a minimum, i will remove the Vortex and remount probably with riser as the groups at 50 and 100 were more than respectable. Perhaps i should remount and try without the riser...Either way i must obtain the accuracy which this rifle in my hands has already been proven...I am stumped and frustrated...I seek any input that gets my headspace and timing right and gets this rifle/optic to group and zero. Thank you to anyone who can understand, drill down, consider and offer remedy/remedies.
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