stephentri Posted February 20, 2017 Report Share Posted February 20, 2017 Hi shot this today all 4 shot group's .223rem border sassen barrel 1 in 8 twist 24 inch 69 grain TMK n140 powder lapua brass cci br4 primer,I would like to know were best poi is 25.2 - 25.5? Thanks Stephen Link to comment Share on other sites More sharing options...
Re-Pete Posted February 20, 2017 Report Share Posted February 20, 2017 I'd say 25.5......I found SMK 69's worked best when pushed hard. What MV's are you getting? RePete Link to comment Share on other sites More sharing options...
stephentri Posted February 20, 2017 Author Report Share Posted February 20, 2017 Never got a chance today to chongraph them, so would you try 25.5 and play with the seating depth Link to comment Share on other sites More sharing options...
simonl Posted February 20, 2017 Report Share Posted February 20, 2017 I don't think you can draw many conclusions from 4 shots, other than possibly excluding a load with flier(s) if you're confident they weren't human error. It's not about finding the best group - it's about finding a good range in which you can further efforts. 24.9 & 25.2, when superimposed would for one reasonable 8 shot group. That means you can probably load anywhere in that range & get good results - I would try more in that area (maybe in the middle) but with say 8 shot groups.. Absolutely forget about changing seating depth based on 4 shot groups to determine charge. You will never reach a sound conclusion - or if you do then you're very lucky. Link to comment Share on other sites More sharing options...
simonl Posted February 20, 2017 Report Share Posted February 20, 2017 Duplicate Link to comment Share on other sites More sharing options...
simonl Posted February 20, 2017 Report Share Posted February 20, 2017 Remember that your best groups could be 4 very bad fliers that happened to land in the same place! Thinking about it, I would re-run the OCW to build up confidence before making a decision on powder recipe. Link to comment Share on other sites More sharing options...
Andrew Posted February 21, 2017 Report Share Posted February 21, 2017 I don't think you can draw many conclusions from 4 shots, other than possibly excluding a load with flier(s) if you're confident they weren't human error. It's not about finding the best group - it's about finding a good range in which you can further efforts. 24.9 & 25.2, when superimposed would for one reasonable 8 shot group. That means you can probably load anywhere in that range & get good results - I would try more in that area (maybe in the middle) but with say 8 shot groups.. Absolutely forget about changing seating depth based on 4 shot groups to determine charge. You will never reach a sound conclusion - or if you do then you're very lucky. This. ~Andrew Link to comment Share on other sites More sharing options...
Murph Posted February 22, 2017 Report Share Posted February 22, 2017 I'd say 25.5......I found SMK 69's worked best when pushed hard. What MV's are you getting? RePete Plus 1 on this. You will see a very definite accuracy node with these around the 3100 fps mark. Anywhere between 25.4. - 26.4 g. This all depends on the pressure signs on your brass. I used h335 with mine which easily reaches 3100fps but I tried another .2 grains in it and it decreased the velocity with more powder. This told me that this load is at the optimal burn for my chamber. Link to comment Share on other sites More sharing options...
simonl Posted February 26, 2017 Report Share Posted February 26, 2017 Plus 1 on this. You will see a very definite accuracy node with these around the 3100 fps mark. Anywhere between 25.4. - 26.4 g. Not doubing your results, but surely you're not expecting accuracy nodes for another gun to follow your experience? Link to comment Share on other sites More sharing options...
Murph Posted March 8, 2017 Report Share Posted March 8, 2017 W Not doubing your results, but surely you're not expecting accuracy nodes for another gun to follow your experience? Well I had very similar results with my own and 2 of my friends 223s using this bullets. Maybe it was luck with 2 guns , but 3 I don't know. They both hit accuracy nodes within 50fps of what my gun was reading. Link to comment Share on other sites More sharing options...
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