Best approach 223

[STW]

I have a pound of H322 and some 55 grain bullets.
Hodgdon says start with 21 gr with a max of 23
Speer's manual says start with 22.5 gr with a max of 24.5

I wasn't planning on max loads but I can just about max out for one while just getting started with the other.:banghead:

 

[54lariat]

What brand bullets are they

I would start low, and work up, since the small load will still fire the bullet, load 5 of each weight increasing like .2 grains, this is always a fun thing to do cause you can see the results on paper


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[ArchAngelCD]

IMO the powder manufacturer's data is more reliable than an outside vendor although I think Speer data is just a copy of the manufacturer's data. What edition is the Speer manual?

I would go with in this order:
1. Bullet Maker
2. Powder Vendor
3. Third Party Manual

 

[Glock20]

I've been using 22gr H-322 over a 55gr Nosler Ballistic Tip and have been very happy with it. Sub 1/2" MOA.... BTW - I found that in my Weatherby .223 when I went up to 23gr, groups opened up a bit.

 

[68wj]

Best approach 223

Approach cautiously and let it know you are there. Those little guys get startled easily.

I have been using 22gr under pulled 55gr FMJs. For this rifle (AR carbine), I am needing reliable function and "close enough" accuracy for relatively close ranges and a 4moa dot sight.

If you are looking for accuracy, start low and work up while keeping an eye on pressure signs.

 

[Hondo 60]

What brand of bullet?

If it's Speer, go with the Speer manual.
It's it's a third party, start with the Hodgdon data.