biggair Posted December 29, 2017 Share Posted December 29, 2017 I have a DDmv7 1:7 twist 16"barrel 5.56 what would you shot in it ?223 or 5.56 what wight 62? thanks Link to comment Share on other sites More sharing options...
kurtm Posted December 29, 2017 Share Posted December 29, 2017 I would shoot what ever shoots best in it. Link to comment Share on other sites More sharing options...
Dan Sierpina Posted December 29, 2017 Share Posted December 29, 2017 Mr Weak Hand has the best answer! Don't get hung up on a particular bullet weight then complain it doesn't shoot. Link to comment Share on other sites More sharing options...
PacMan Posted December 30, 2017 Share Posted December 30, 2017 I bet it would should 55 gr. Blitzkings very well. Forget about the 62 gr (most likely green tip steel core), okay for making holes in paper but don't expect even 2 moa groups. Link to comment Share on other sites More sharing options...
californiasushi Posted December 30, 2017 Share Posted December 30, 2017 (edited) That's a 5-shot group I shot during load development for our 16" DD 1:7 twist gov't profile barrel with 26.2 gr WC844 (H335 surplus powder), a Hornady 55gr FMJ, Wolf 223 Primer, and LC brass. I used a Harris bipod and Burris XTR II 1-5x. Unfortunately we have two other DD 1:7 twist barrels but that load doesn't shoot well in those. Those get better results with 75-77gr OTMs. Edited December 30, 2017 by californiasushi Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted December 30, 2017 Share Posted December 30, 2017 CALSUSHI, is that a common group size, or The Best. Great group !!!! Link to comment Share on other sites More sharing options...
californiasushi Posted December 30, 2017 Share Posted December 30, 2017 (edited) Thanks! I don't really shoot 5-shot groups with the gun to be honest, just during load development and zeroing. That was the best group of the day from one of my load development sessions and here's the other best group of the day from a different load development session with different brass but still a Hornady 55gr FMJ bullet: I shot that with the Burris XTR II 1-5x and a bipod but I remember not having a rear bag with me at the range so I just used a rolled up tripod bag or something like that so that may explain some of the vertical dispersion. I don't think groups like that would be too uncommon with that gun considering how it shoots steel but I really don't know since I'm not a fan of shooting 5x5's or anything like that. YMMV Edited December 30, 2017 by californiasushi Link to comment Share on other sites More sharing options...
Blue Jacket Posted December 30, 2017 Share Posted December 30, 2017 My DD 1/7 likes 77 gr smks. Much more than 69 or 55 grs. My 100 yd group was similar to Casushi. My shots were prone off my back pack as a rest Link to comment Share on other sites More sharing options...
mpeltier Posted December 30, 2017 Share Posted December 30, 2017 I have tried 55gr, 60gr and 75gr (all Hornady) in my DD 1/7 and it likes them all, but the 75's were a little better than the others. The 55 and 60's were averaging 1" to 1/14" at 100yds and the 75gr consistantly hit 3/4". Link to comment Share on other sites More sharing options...
CPD7119 Posted January 4, 2018 Share Posted January 4, 2018 Here is a bullet weight scale i came across. Take it for what it's worth. Might give you a good starting point to find your weight, like a few others said shoot what the gun likes! Link to comment Share on other sites More sharing options...
Gabes Posted January 4, 2018 Share Posted January 4, 2018 I'd start running a variety of pills through it and see what works. I've heard guys swear up and down that a 1:7 barrel can't shoot 55gr bullets. My 16" Colt show 55 gr just fine... and 69 grs, and 77 grs... etc. Put it on paper and see. Also, take into account your needs. If you're shooting paper/cans/watermelons at the range from 50-100 yards, who really cares what bullet. If you want accuracy past 200, you will need to do more work. Link to comment Share on other sites More sharing options...
Tech13 Posted January 21, 2018 Share Posted January 21, 2018 Like others are saying, shoot a variety. My 1:8 twist 16" AR loves 55gr fmj's which according to some charts usually wouldn't shoot as well. Shoots 3/4" groups consistently with 26gr of cfe223 powder. Link to comment Share on other sites More sharing options...
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