Thread: Getting ES down with 223

I've used the method before with good results. Typically I did three shots per charge weight to give a more detailed graph showing ES/SD/AVG rather than a single data point.

What became clear was that not all powders displayed the flat spots that you're meant to be looking for. Some were basically linear when plotted out. 2208 usually had clear nodes. It wasn't intentional, but I found one the other day with a 308 anyway whilst doing a quick workup to check for pressure; three charge weights across 0.6gr of 2208 produced only 9fps in change in velocity. I plan to repeat that to confirm the result and will probably load a group somewhere in amongst it, assuming it wasn't a fluke.

Anyway, none of the powders I've tried with 50-55gr bullets in 223 produce these flat spots. Or if they are there, the ES/SD is high enough to obscure them.

So yeah.. Other people's chrono results would would be good to compare against.