wc-735 in 5.56 Brass

pac_man

pac_man

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Anyone have any load data for WC-735 when using Lake City's 5.56 brass with either 55gr or 62 gr FMJ bullets?

The brass actually comes from American Eagle .223 ammunition but it bears the Lake City Marking and the NATO circle and crosshairs which makes me think it is really 5.56 brass that lake city is providing. I've already bought the Dillon Super Swager to remove the primer crimping.

I'll be shooting it in an AR-15
 
If you weigh various .223 and 5.56mm cases you will quickly discover that unlike other calibers, there is almost zero difference between them in terms of weight (and thereofre capacity). Some third world military stuff is heavier or lighter, but all the North American stuff is virtually identical, regardless of maker or intention for military, police or commericial markets.

I use 26.0grs WC-735 with 55gr FMJ in mixed W-W, R-P, LC, PMC, IVI, CJ and MAL cases, and there isn't a whit of difference.
 
I thought the inside dimensions were slightly different because the 5.56 brass was slightly thicker and had a lower case volume and therefore a different pressure? I'm guessing your brass shows no signs of pressure problems or anything?
 
No problems at all. Military .308 and .30-06 brass were thicker than their civilian counterparts, and many people assume that is the case with .223/5.56 as well. But it generally isn't. If you are wondering about a specific headstamp, weigh 10 cases of those in comparison with ten of something else. If the interior volume is less, that means the walls will be thicker and that means the case must be heavier.
 
Type "735" in the search in this forum, and you will find some load data that I had given previously; the 223rem, and 5.56 are the same cartridge.
Mike
 
If you weigh various .223 and 5.56mm cases you will quickly discover that unlike other calibers, there is almost zero difference between them in terms of weight (and thereofre capacity). Some third world military stuff is heavier or lighter, but all the North American stuff is virtually identical, regardless of maker or intention for military, police or commericial markets.

I use 26.0grs WC-735 with 55gr FMJ in mixed W-W, R-P, LC, PMC, IVI, CJ and MAL cases, and there isn't a whit of difference.
Click to expand...

Both cases sized, trimmed and primed with a BR-4
10 cases averaged.
Lake city 06 95.8gr
IVI 05 103.6gr

Almost an 8% difference. The Sierra accuracy load of a 69 gr SMK over 25.3 gr of Varget will not even fit into an IVI case.
 
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