Single radius shoulder?

flandersander

flandersander

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So, I was playing around the reloading bench, specifically forming ackley brass without fireforming. Using water to blow out the shoulder.
It didn't work very well, but I ended up making a piece of brass with a single radius shoulder as seen in the picture below. Which got me thinking, why couldn't a guy do a single radius shoulder wildcat. It would headspace similar to an ackley (this one still fits in a 223 ackley chamber)


Thoughts on this? Any info on it being done before? Can't find much on it, possibley the 7mm Vom hofe?

37db6c7d72627a9a214ad552af426d45_zpsiztnpdph.jpg
 
rl4930 said:
338 wolverine?? And aren't some of the weatherby cases like that? Also, what caused that stretch mark about 3/16" above the case head?
Click to expand...

Weatherby used a radius at each end of the shoulder, not a single rad. like is shown.

Suspect that the reason it was not done a lot was the PITA that it would be to grind the large radius on a reamer compared to a straight line. That theory falls apart when you look at a bunch of prints and see the radii all over the place though.

Cheers
Trev
 
By the looks of the rim (possible extractor marks) and the shiny ring ahead of the case web, am I right in assuming that is a very well used piece or brass?? Haven't seen a 223 separate myself before but that one looks suspect.
 
It's a piece of range brass. Unknown number of firings. The picture makes it look way worse than it is. No signs of case head separation from the inside (have a feeler pick thing).
Suppose a reamer maker like Manson, ptg or Clymer could make something like this.
I think it's a cool twist on an "improved" design of a common cal.
One could really only speculate on how much, if any, it would improve.
So there's really nothing done like this before? I'm not finding much.
 
What hydro-forming die are you playing with? You said it didn't work so well?

I use a whidden with good sucess for my modified Saum
 
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