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Whoohoo ! That's more like it.

With your ADI brass, is there any significant crimp on the primer pocket ? That could also potentially be a cause for inconsistent primer seat / ignition. I just use...

It's a conundrum alright :D

I'd be interested to see if your SD numbers differ dramatically for other charge weights. Maybe do 5 shot strings at 24.0, 24.5. and 25.0 ?

And then of course...

Are all the 55gr and lighter projectiles giving you large ES/SD numbers ?

It could be that you are seating the light pills further from the lands, so more time in the freebore giving you...

If you are getting good ES/SD with 69gr out of the same 223 rifle, could it be something to do with twist rate ?

Have you tried other 55 gr projectiles ?

Hey Zimmer :) Always fun talking to you about reloading.

I'm curious about your experience with the Redding body dies. That's what I've been using for years. Do you think the body die somehow...

Pommy, what SD are you getting ?

It would also help to know how many shots in a typical string when you are measuring.

ES only looks at the outer edges of a series, it is a poor measure.

In...