Sounds like you are confirming my instincts that if I run a 223 load in 556 cases I will be well below pressure that is safe for the rifle but slightly above the 223 data since the case volume is slightly smaller. Basically I will have ultimately ended up with a dialed back 556 load.K-Texas wrote: ↑Sat Jun 06, 2020 12:28 pm
You can load down to .223 level in 5.56mm cases, although your loads may differ slightly from the data due to the somewhat smaller case capacity/slightly thicker brass of the 5.56mm NATO. Loading 5.56mm NATO loads in .223 Rem. cases will shorten the life of the cases except maybe in the case of Lapua brass which has a higher test pressure rating. But it is more expensive.
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Return to “Brass for 5.56 reloading”
- Sat Jun 06, 2020 1:41 pm
- Forum: Reloading Forum
- Topic: Brass for 5.56 reloading
- Replies: 6
- Views: 19232
Re: Brass for 5.56 reloading
- Sat Jun 06, 2020 11:18 am
- Forum: Reloading Forum
- Topic: Brass for 5.56 reloading
- Replies: 6
- Views: 19232
Brass for 5.56 reloading
It looks like my stock of brass for my M&P15 is just about done. I'm starting to see case neck cracks. The brass began life as Remington 223 55gr FMJ and I have been reloading 223 spec loads for my AR.
My question is whether I should restock with 223 ammo or 5.56 ammo? I am aware of the difference between the loadings and my rifle is chambered in 5.56. Can I use the 556 brass and load 223 or is the case wall thickness going to be a factor? If I use 556 brass should I only use the 556 loadings from my Hornady book? Will my 223 dies cause any issues?
My question is whether I should restock with 223 ammo or 5.56 ammo? I am aware of the difference between the loadings and my rifle is chambered in 5.56. Can I use the 556 brass and load 223 or is the case wall thickness going to be a factor? If I use 556 brass should I only use the 556 loadings from my Hornady book? Will my 223 dies cause any issues?