Thread: 228 Speer projectiles in 223.

Anyone used Speer 70 gr 228 projectiles in 223, gunsmith tells that it's no problem with the 4 thou larger diameter. ?

Oh really?
Why on earth would anyone use oversize projectiles when the same projectile in the correct size is available. The 70 grain Speer projectile is very blunt and has a long bearing surface to stabilise in slower twists. Both of these push pressure up even without being oversize. What crap.
GPM.

Originally Posted by grandpamac

Oh really?
Why on earth would anyone use oversize projectiles when the same projectile in the correct size is available. The 70 grain Speer projectile is very blunt and has a long bearing surface to stabilise in slower twists. Both of these push pressure up even without being oversize. What crap.
GPM.

These aren't the blunt nosed projectile, they are pointed spire point with the cannulure, their actually 227 diameter.

Still a stupid idea. Where would you get data from? Regardless of shape the extra dia will push pressure up. How much? Who knows? The target shooters used to use undersize barrels to help the crappy NATO projectile shoot better but that was a projectile with hardly any full dia body in a much larger bore. Sounds like someone may be trying to unload something. Get the right projectile.
GPM.

Hmmm. It depends. Quite a bit of "depends" is in the throat design. I followed GPMs thinking for years until I got involved with 8x57s, which if you read Yank gun-writers rubbish are death traps with the differences between the S,J and I bores ranging from 0.318 to 0.323.

However a bit of study shows that the Euros were well aware of potential issues and nearly all military rifles were re-throated to allow the use of 323 ammo in older weapons. Reamer design was also changed for 8mm type cartridges.

Since I learned of this I've used quite a few oversized projectiles for obscure Chamberings, being careful to work up loads in the usual way. They usually shoot pretty good, I have a 8x57 with an octagonal barrel, full intregal rib and very light that has a 0.319-0.320 bore. It shoots 170 gn Hornadys 323's into very small groups.

Greetings @Tentman and @tetawa.
With the 8x57 in your lovely sporter you are using .323 projectiles out of necessity and likely loading to low pressure. It is likely that the .323 projectiles are quite soft for the obvious reasons. For use in a .223, as Tetawa is considering, correct projectiles are available. I suspect that they are made by Hornady rather than Speer and if so are flat base. Quite different than the NATO projectile I mentioned. I stand by my earlier statement the for the .223 and the projectiles could be dangerous and should be avoided.
Regards Grandpamac.

Must have Speer on the brain, their Hornady.

so designed for .22hp savage...if anyone has one please offer this man a swap..... they should be great..wont get into if they are ok of not...will mention 7.62x39mm with .308 barrel using .311 and .131 projectiles and leave it at that
I BELIEVE the size yo uhave got a hard to get anymore so anyone with a HP savage will be happy to get ahold of them.

And to think I have been hassled for using 224 cal projectiles in my 1949 BRNO Hornet. You'll blow it up etc etc.

Unless your Gunsmith friend has a few hundred stashed away they are a waste of time Hornady discontinued them several years ago they are no more,
RWS still loads the 5.6x52/.22 Savage HP I believe, if you want decent ,224" hunting bullets use Sierra 63 SMP or Hornady 70 GMX 50 CX 50 ECX all will
be better than the .227" .

Originally Posted by zimmer

And to think I have been hassled for using 224 cal projectiles in my 1949 BRNO Hornet. You'll blow it up etc etc.

A little bit of a difference with a 0.001" variation, thats almost the variation in diameter due to temperature change of the pill...