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Message: <blockquote data-quote="swampratt" data-source="post: 2853531" data-attributes="member: 15054">You see what  NikatKimber stated.You really find stuff out like that rather than shooting all 3 of the same load back to back to back.Stick with 42 if you like it and see if you can make it happen on another trip to the range.Shoot more than 3 of the load that pleases you.. take your time if you wish as to keep the barrel cool.Now you may even shoot 15 or 20 of that same load .. keep track of which piece of brass shoots out of the group like a flier.Then prep those 15-20 cases again and load them the same.. go shoot again and have the brass set aside that was a flier.. see if it is still a flier.. if it is then that should not be used again for shooting groups.. it can be used for a fouler shot.Dang all the shooting <img src="/images/smilies/smile.png"  class="smilie" loading="lazy" alt=":)" title="Smile    :)" data-shortname=":)" />Wind sucks sometimes..What i do see is that 41.2 through 41.8 shot the same height  away from the black dot.. 41gr was lower towards the dot as was 42gr.Did you have a chrony during this testing?I  loaded some .223 and reached a point where I was losing velocity .3gr more and averaged 50fps less. I was not at max for book reference either.Funny how things work.</blockquote>