Im loading ammo for my 6.5 CM with a 22 inch Gradous barrel. Loads tested were 41.5 grain and 42 grains of H4350 Each load was a Hornady once fired case (through my rifle), a 140 ELD-M, Federal Champoin large rifle primers, Full length resizing, and loaded to 2.8 COAL. All done with a Lee hand loader The 41.5 grain load shot better accuracy but it had a SD of 19. 2020-01-13_03-25-21 by chase ditwiler, on Flickr I yanked one on this group but it still shot a decent group 2020-01-13_03-31-10 by chase ditwiler, on Flickr The 42 grain load shot lower SD of 12 but would overall shoot a little less accurately and would throw a flyer every so often. 2020-01-13_04-35-42 by chase ditwiler, on Flickr 2020-01-13_04-36-00 by chase ditwiler, on Flickr This 42 grain group shot better but I had a primer that wouldn't ignite so it's only a four shot group (last of my loaded rounds) 2020-01-13_03-24-38 by chase ditwiler, on Flickr Now I fully acknowledge that the flyers could have been me but those shots felt good and I was shooting off a concrete bench using bags. All the ammo was loaded at the same time and Im not sure why the flyers would be so far off. Im still fairly new at reloading so what should I be looking for to either improve the SD on the lighter load or get rid of the flyers on the hotter load?