Safe to use same 223 load data

[nickn10]

I had to switch to CCI 450 primers and LLC brass for 55grn 556 loads from CCI 400 primers and RP 223 brass loaded with H335 25.5 grns. Should I decrease powder loads? Thanks for responding,
Nick

 

[Bartojc]

Whenever you are switching components the answer to your question is always yes you should. Especially in your case you are close to max with a load of 25.5gr H335 it would make sense to back down and work back up with the new primer especially.

-Jeff

 

[nickn10]

Whenever you are switching components the answer to your question is always yes you should. Especially in your case you are close to max with a load of 25.5gr H335 it would make sense to back down and work back up with the new primer especially.

-Jeff

I figured that darn it, with primers so hard to find I was hoping to get a suggested load. Hate to use more primers experimenting.

 

[nickn10]

I figured that darn it, with primers so hard to find I was hoping to get a suggested load. Hate to use more primers experimenting.

 

[Bfh_auto]

The safe answer is reduce and rework.
Some people don't. But no one will say to do that because it's a safety risk.
You have to weigh it out. Is your health worth saving some primers?

 

[AJC1]

Testing and information can help you make the best decisions at hard times. How do the brass volumes compare. All other factors being exactly the same that's what is most important to know. Grab your scale and test.

 

[Ironicaintit]

I wouldn’t drop down very far to work it back up. I’d probably start with .4gr less, maybe even as little as .2

 

[JFrank]

I had to switch to CCI 450 primers and LLC brass for 55grn 556 loads from CCI 400 primers and RP 223 brass loaded with H335 25.5 grns. Should I decrease powder loads? Thanks for responding,
Nick

Where did ya get 450 primers pal ? Lol
I was always told that with any component change the node can and most likely will move slightly, a little testing on each side of your current charge should help re- aquire that node.
J
BTW; shouldn't you be using large rifle primers with a 556 ? Just curious..

 

[nickn10]

556 Nato 223

 

[nickn10]

The safe answer is reduce and rework.
Some people don't. But no one will say to do that because it's a safety risk.
You have to weigh it out. Is your health worth saving some primers?

Just barely.

 

[nickn10]

I wouldn’t drop down very far to work it back up. I’d probably start with .4gr less, maybe even as little as .2

Went to 24.8

 

[nickn10]

Where did ya get 450 primers pal ? Lol
I was always told that with any component change the node can and most likely will move slightly, a little testing on each side of your current charge should help re- aquire that node.
J
BTW; shouldn't you be using large rifle primers with a 556 ? Just curious..

I live in a small town/county with a great rifle range ( up to 1800 yds) and many gun and pawn shops. Many oldtimers will trade some of their stash for what you offer, primers in this case. Oh BTW I meant 5.56 as I'm sure you knew.

 

[Charlie98]

Especially in your case you are close to max with a load of 25.5gr H335

That. If you were in the middle of the book data, I would say load 5 or 10 test loads and check them... but not pushing max, and particularly with H335.

I use both RP and LC brass in 5.56mm, they are pretty close... but they are not the same. I think you will be OK at 24.8grn, as you stated, although I would probably have dropped down to 24.5grn.

 

[Bfh_auto]

Where did ya get 450 primers pal ? Lol
I was always told that with any component change the node can and most likely will move slightly, a little testing on each side of your current charge should help re- aquire that node.
J
BTW; shouldn't you be using large rifle primers with a 556 ? Just curious..

556 is small rifle and small rifle magnum.

 

[JFrank]

Thank you
Now I know.
J

 

[Rule3]

But what exact bullet. Load data varies as to primer, brass and Projectile depending on what source you use.??

Switch from 556 brass to 223 brass is an issue The max powder charge per Hodgdon could be 22.7 OR 25.3 depending on bullet but then they used Win brass so look at all those variables!

So yes the correct answer is A) start ALL over, but in reality I doubt you would know the difference.