Neck turning angles

[Brians356]

I got the idea of using the .22 bullet from something that James Mock wrote. The additional step of turning @ .22 is my innovation, based on my experience and experiments trying to expand necks without making them more crooked. As far as comparing the .22 bullet method with doing the same thing without a bullet with Bullseye, it is probably a toss up except for someone who does not have a worn out barrel to use for fire forming. I am not all that excited about firing a lot of high nitro content powder in a good barrel. I have fired a few of the .22 bullet loads in one and checked for unusual copper afterwords and found none. I was concerned that the bullet might be rattling down the barrel tearing off chunks of jacket as it went, but apparently that is not what happens. I tend to enjoy trying new things as long as I do not think that they are unsafe.

Another thing that I have that I think is worthwhile is a one piece 6PPC die that has a .258 neck ID. It comes in handy when I want to turn necks thinner or return them, because, unlike bushing dies, it sizes all the way to the shoulder. It is a stock Hornady die.

Wouldn't it be cool if the 22 bullet doesn't even touch the bore? Maybe there's something akin to "ground effect" in aviation, but here a cushion of gases resisting compression, and keeping the bullet near the bore axis.
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[BoydAllen]

I have often wondered if this is why I have seen some seating depths that involved very long bullet jump to the rifling be very accurate in some rifles, that perhaps the bullet was completely released by the neck and centered by the gas flow before contacting the rifling. Of course this is complete and probably unverifiable conjecture.

 

[Brians356]

I have often wondered if this is why I have seen some seating depths that involved very long bullet jump to the rifling be very accurate in some rifles, that perhaps the bullet was completely released by the neck and centered by the gas flow before contacting the rifling. Of course this is complete and probably unverifiable conjecture.

So much of internal ballistics is still unverifiable conjecture. But, we're all entitled to our conjectures - obviously!
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