Cheers.

You should consult one or more reloading manuals for load data. There are a wide range of propellants which are suitable for the .223. Charge weights and COL are dependant upon the propellant used, type and weight of bullet, and the throat and/or magazine dimensions of the individual rifle. What is a safe load in one gun may not necessarily be the same in another. This is why loading manuals give a min/max suggested load for each bullet weight and propellant combination with the advice to start at the minimum and work up loads incrementally watching for pressure indicators.
Be careful with internet loading data and recipes. Best to use what comes from a proven manual by an established manufacturer-Speer,Hornady,Nosler,Sierra,Lee,Lyman,Hodgon are some of them.
 
You have to work up the load for your rifle. I've always started with whatever powder is given in my Lyman manual for the accuracy load for whatever bullet weight I'm loading.
What bullet weight you pick depends on the rifling twist in your rifle. Heavy bullets tend to prefer a fast twist. Light varmint bullets a slower twist.
Use the OAL given in your manual.
You should separate the two brands of brass too. Milsurp brass is a bit thicker than commercial and requires you to drop the powder charge by 10% and work up. Mind you, LC 5.56 brass isn't always thicker. Weighing one will tell you.
 
Question is: Which powder you guys use? And of course how many grains? COL?

Any suggestion welcome! But please keep it to the powder brand and the load etc...

I use 25gr of H335 under a 55gr fmj, or 25gr in varget...I prefer H335 it meters way better...

For now the first shipment of bullets will be 55g FMJ.

My barrel is a 16" HBAR 1/9 twist 5.56 NATO on a Bushmaster XM-15.

Load your 55FMJs to magazine length. That would be 2.26" C.O.A.L. or perhaps a bit less; be sure to verify that they easily fit into your magazine.

I have gotten very good results from H4895, which is a very close cousin of Varget. But these short grained stick powders flow somewhat awkwardly into a narrow .223 neck, you have to be vigilant in case it bridges.

It's a lot easier to use a ball powder such as Win-748 or H-335 or BL(C)-2, etc, they flow nearly like water. See your favourite loading manual, and work your way up to the max load. I have used WC-845, which is a non-cannister powder similar to H-335, which I got from Higginsons Powders, for a pretty darn good price. It's not available anymore, but WC-735 is (you use H-335 data less 10%, IIRC - it'll be on the box).

When you need to buy bullets again, you might want to try slightly heavier bullets (your 1-9" is able to stabilize bullets up to 75 grains). I've shot a few Armscor 62 FMJBT bullets ($150/1000 from site sponsor http://www.mysticprecision.com/ ), they are excellent plinking-grade bullets. I used 24.3 WC845 with them, which gave 2950fps in my 20" barreled AR-15 (you'd probably get 2800-2850 in your 16" bbl). If I load up more I'd probably go half a grain hotter.

Another cheap bullet that might shoot reasonably well for you in a Winchester 64 grain Power Point, it's a flat-base lead-tip hunting bullet, they were about $20 per 100 from Higginsons when I bought them. 25.0 of H4895 gave me a nice hot 3080 fps with them.
 
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I have reloaded a boat load of .223 for plinking, and I found the WC-735 that Higginson Powders sells is great and cheap!

Currently $119 for 7 lbs of the powder, and it has gone up considerably since I bought my last shipment. If you get 21 lbs at a time the shipping is free! Might need a few people together for that deal. :)

I have never found reloading data for it, but reducing the data for H-335 (by 5% like Higgison says) has worked perfectly for me.

I do not reload .223 for extreme accuracy, I just plink with it, so I have no idea if the powder is any good for extreme accuracy. It works great for me.

Mike
 
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