As is? Yes & no. I'm light on neck tension, another case using what I had to work with, so am seating bullets slightly long and finish when chambering. I'm using a Redding S die adjusted so it just touches the shoulder without bump. Ordered another bushing last week that will let me reduce neck diameter an additional .001".I like the looks of the bullet except it looks like the nose is hanging in space. Does the top cartridge in the photo chamber as-is? How does an un-sized bullet fit nose-first into the muzzle? Use a bushing neck sizer die or Lee collet sizing die to give yourself about 1.5 thousandths loaded neck tension and start out with something like 2400 powder. I bet it shoots.
I get that, it's the putting it in words in an easily understandable and relatable form that others can grasp without overwhelming them that becomes the problem. And as you said, why is 100FPS less not a problem? Where's the cut off point? 50 fps less? 25? 33.4? There are limits that get pretty hard to quantify and they aren't absolutes, or at least I don't think they are. That's why sometimes when you or Fiver write something that probably seems clear to you, fellers like me struggle to see exactly what the whole picture you're trying to paint is. In your example, "obturation" means more than one thing and actually "obturation" isn't even the correct term, at least according to Felix. And then we add in your reference to it happening sort of repeatedly as the bullet proceeds...that's a lot to take in! Might be easy for some but it's taken others years before the idea clicks.Think about it, Bret, what happens to the base of the bullet when the front encounters sudden, high resistance to movement in the throat right as the pressure is zooming up the front side of the curve?
Witchcraft!!! Anyone who can exceed the RPM Threshold is practicing witchcraft!!!@waco has a post on the other site and this is what they are trying to tell him about his new Ruger in 223. It seems that a certain person has everyone believing in something that he can not do. So everyone just repeats what he says.
Quote" Because I would be limited to a velocity of 1300-1400 fps in order to stay under the RPM threshold, 120,000-140,000 RPM. At 1400 fps you're upwards of 120,000 RPM, bullets tend to become unstable when you exceed the threshold. I could shoot them at 1250-1300 fps but I don't need another 22 RF."
"If you use an alloy like Lyman #2 or harder and a gas check you can easily go to 140,000, which is 1555 fps. I use Lyman #2 and a gas check in my CZ-527 (223 Rem) and groups start to deteriorate just past 140,000."
Nah!, easy explanation. The bullets were spinning wildly out of control, but they just happened to spin wildly out of control towards each other. Makes perfect sense. If the target had been 3 yards further way it would have been a 6 foot pattern!I’m sure the RPM’s are off the chart. You must have got real lucky there….
It's the anti-intuitive stuff that boggles the mind. Like, harder isn't necessarily going to work better or at all.the fact is there is more than one way to get there.
i got a sort of confession some time back that 'one way' being used was with light bullets.
paper works, a coat works, center line and design works, only it works in conjunction with powder speed and ALLOY.
they all got a limit of sorts,,,,,,,, so do jacketed bullets.
if they didn't we wouldn't be changing the jump, buying different brands, changing powder, cutting necks, weighing cases, trimming meplats, shooting ladders, and all the other stuff we do.
ask a cast bullet guy about doing all that stuff.
98% of them just shrug and say,,, why?
well.