Calculating best bullet for my .44 Mag twist of 1:20


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Eb1
August 1, 2010, 11:40 PM
I used the calculator here http://kwk.us/twist.html, and I came up with this.

I measured 10 bullets, and the average was .7228" in length.
The average was .430" in diameter.
It is a lead bullet, but mixed with alloy so I used 10.9.
I put in the average of 10.0 grains Unique. 1120 fps

I need a 1:30" twist barrel to actually shoot this bullet. To get the twist to 1:20 with these measurements I need the velocity to be 500 fps. 500 fps! From my .44 Magnum for the 1:20 twist barrel and this particular bullet.

Is this just way off or what?

Or without getting to far into physics would the 1:30 be the minimum twist, and the 1:20 be more on the optimum twist rate?

I was trying to figure out the velocity that would give best bullet stabilization for my loads without playing the guessing game.
I am probably way over my head.

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ArchAngelCD
August 1, 2010, 11:46 PM
I don't know anyone who worries about twist rate in a handgun bullet. I've never heard of a revolver not being able to stabilize a bullet because the twist rate was wrong. IMO you are way over analyzing bullet choice. Make up the load, shoot it and if it's as accurate as you expect it to be call it good...

Eb1
August 1, 2010, 11:53 PM
:)
Must come from my 600+ rifle shooting hobbies.

More quick reading leads me to believe that Ruger has the 1:20 twist to be able to stabilize the larger 300+ .44 Magnum bullets.
Which makes me wonder if that possibly would be a better load for this revolver.

You're probably right, ArchAngelCD. It happens to me every time. When I get something new, or get into something I go way into it. Sometimes I just don't know when to call it good enough, but then again can it be good enough? Maybe I am still to young to understand good enough, and I am not making a snarky comment on my elders. I just want the most out of what I have that is all.
But I guess there has to be a time when good enough just has to do.

ArchAngelCD
August 2, 2010, 12:00 AM
There's nothing wrong with getting deep into a new hobby but in this case, maybe not too deep...

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