Hornady .224 55gn SP Projectile experience

[yoshie]

You're saying they might not stabilize because that's too fast for the 40gr headspace?

That's not what head space is.

They will be spinning to fast, they will be stabilised but accuracy will be not good. There is a sweet spot, and 40s aren't in it with that rate. 60s to 75s will be great, 55s will be good, 80s maybe. 75s and up need a 1:7.5, 40s to 55s need 1:12, 1:9 is good for everything in between.

[yoshie]

Just to clarify, bullets need a certain amount of spin to stabilise, the longer a bullet the more spin it needs. Heavier bullets are longer and that's why you need a twist ratio that is faster, (1:12 is one twist every 12 inches, 1:8 is one twist is 8). You can shoot short bullets is fast twist. More energy goes into spinning them than needed, and their performance is usually lacking. Over stabilised bullets (spinning too fast) shoot better than unstabilised bullets ( sometimes don't even hit the target) but not as good as perfectly stabilised ones.

[lowb]

That's not what head space is.

No, I was asking the person 'headspace'.

Above my original reply there...

[yoshie]

Ha ha! That's embarrassing.

[Oldbloke]

silly sausage. LOL

[lowb]

he he .

All good, better to explain in if someone might have misunderstood and is about to do something stupid

[headspace]

Ha ha! That's embarrassing.

I wondered when my username would create a drama. The trouble with all this is that no one twist rate is going to do it all. I have a 223 with 1:12 and it loves 50 to 55gn Sierra's However bring a Nosler into it and being a slightly longer bullet even though it's still 55gns it just doesn't work.

Sierra 55gn Game Kings have surprised me by shooting just over an inch at 100m and yet strayed only to an inch and half at 200m. Clearly that bullet stabilised better at a longer range.

I'm still experimenting with Hornady 50gn Vmax and Sierra Match Kings in 52 and 53gn. So far my best is 5 rounds into .4 inch at 100m with the 53gn MK's.

Regardless of all the info you get here, your rifle still has the final word. Load development is one of the great things that keeps us coming back for more.

Factory ammo will get you only so far, the real rewards come when you start cooking them up yourself.

JD

[Monty]

I wondered when my username would create a drama.

We can always change it if you like.

(no pressure, just saying)

[headspace]

I wondered when my username would create a drama.

We can always change it if you like.

(no pressure, just saying)

Thanks mate but no, I'll stick to it. I'm sure it may be cause for head(space) scratching here and there, but we're all pretty switched on here I reckon.

[Monty]

No worries. Just mentioning the option

[not shore]

Hornady sp 55gr are a basic allround projectile the explosive bullets are the hornady sx sp 55gr the more for foxes

[kurl]

We can always change it if you like.

Sorry, OT here...

Can we change it or mod has to change it? I couldn't see an option?

[Blackened]

A mod has to change it for you.