.223: change brass headstamp, redo ladders?


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capreppy
October 10, 2011, 12:08 PM
I shot some Nosler .224 60gr BTBT. I found the optimal charge for my weapon of 24gr of H335 (got less than .4 MOA groups). I am using CCI #400 SRP. When I did my ladders, I was using LC '09 5.56 NATO brass. I'd like to use FC .223 Rem brass. I know that the LC brass has a little less capacity. Will there be a significant impact to accuracy? Enough that the optimal charge with a change in brass warrants redoing the ladders?

The Nosler is a Varmint round and am looking for very good accuracy (think humane kill here). I really don't want my groups opening up to the point where I could mame the little critter rather than the catastrophic kill that I am looking for.

Thanks in advance!!

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rcmodel
October 10, 2011, 12:16 PM
The only way to know for sure is to try it in your rifle.

And the only way to know for sure how much difference in case capacity?

Size & trim both brands, fill them with water, then weigh them on your powder scale.

Other factors that could effect accuracy when changing brass include neck thickness and neck hardness.
Both would change the amount of case neck tension, or "bullet pull".

But regardless of that?
24.0 grains of H-335 with a 60 grain is a MAX load according to Hodgdon.

So you need to back off and start over to get where you are at any time you change any component.

rc

capreppy
October 10, 2011, 12:28 PM
You are correct in that 24gr of H335 is a max load (missed that) according to Hodgdon's. I'll redo my ladders.

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