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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by Squigie on January 15, 2019, 02:50:33 AM »
Not a problem.
Even if I end up opting out on this one, I figured I'd lend a hand to fellow .32 gunners.
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Group Buy Discussions / Re: 41 cal Round Nose for Revolver/Levergun
« Last post by GregP42 on January 14, 2019, 11:42:12 PM »
Something to look at



Any changes welcome!

Bullet maker, maker
Al Nelson

Al,

You make it and I will buy one :) It looks almost like my 41028 bullet.

Greg
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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by wheelgun on January 14, 2019, 07:46:37 PM »
Ok that all makes sense. I’m fine with either way, I was just wondering because the drawings of the others look to have a flat square driving band.

 Also thanks for taking the time to draw these.
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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by Squigie on January 14, 2019, 05:11:50 PM »
(...)
Why is the 90 degree on the front driving band bad? I understand the lube grooves not being true 90s to drop from the mold easier, but why the angled driving band? Wouldn’t a flat, sharp cornered driving band like on the 358156, or NOE 315-115 swc cut cleaner holes in targets and game?
(...)
It's not "bad".  It's just like lube grooves:  90-degree angles increase the chances of having a 'sticky' mold, because they force the bullets to move exactly perpendicular to the cavity, rather than being able to just kind of 'fall out' with some draft (angle) to the faces.

There isn't much difference between a square driving band and a few degrees of draft, when cutting paper. (In my opinion, there is no difference.)  Semi-wadcutters are a compromise, anyway.  They cut well on the meplat, but are more prone to tearing at body diameter than a full wadcutter.

Neither 'square' nor 'drafted' is right or wrong.  They're just different.
When I design bullets, I take into account everything that I can.  For me, trying to design a bullet that drops freely is high on the list.  Because if the mold is 'sticky' and I don't like casting with it, then I'm not going to want to use it and won't be shooting many of those bullets.

It's just my approach, my opinion, and how I do things.
But it's not the way this bullet has to be designed, if it isn't what people want.
The designs I posted were just for discussion and consideration.
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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by wheelgun on January 14, 2019, 04:15:13 PM »
Ok thank you, that makes sense.

I hadn’t thought of the heavier load, case capacity aspect. I don’t load Skeeter type loads with the 358156, so I guess it never occurred to me lol. I use it loaded out longer purely for OAL issues with a couple OAL sensitive lever guns.

My initial thought had been about using it to load longer 32 S&W Longs to feed through a finicky Henry. Then thought it should work the same for the H&R Mag too.
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Forum Questions / Problems / Re: Center of Gravity & Center of Pressure
« Last post by SwedeNelson on January 14, 2019, 02:55:34 PM »
Calculated with the gas check off
The gas checked bullet should be more stable

With out Gas Check
CG 48.99%
CP 48.99%

With Gas Check
CG 47.59%
CP 47.90%

The best explanation I can offer to visualize CG vs. CP is if you were to balance the bullet on the edge of a knife blade. The actual bullet's balance point would be the CG. Now we cut out a silhouette of the bullet from stiff paper stock and balance it on the knife, that would be CP. So it is a 3D to a 2D relationship.


This drawing is exgagirated for the example

 
From Long Range Shooting: External Ballistics - Bullet Shape, here is the short of it.

"Therefore, because of the bullet shape, the projectile will always fly at an angle, called angle of attack, relative to the trajectory. ... Since the point of pressure is positioned in front of the center of mass, the air flow will force the bullet to rotate backward, pivoting on its center of mass."

Thanks RanchDog for your input!
Bullet maker, maker Al Nelson
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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by 376Steyr on January 14, 2019, 02:29:16 PM »
"Also why does the band between the crimp grooves have to be so wide?"

The 327 is 0.125" longer than the 32 H&R.  If a fellow wants to use full power 327 loads in H&R brass, the distance between the two crimping grooves needs to somehow be 0.125"

The original 358156, loaded long in 38 Special brass, actually results in having less case capacity than in 357 brass, so a "Skeeter Skelton" load is actually loaded loaded a little lighter than a full power 357.  Skeeter's load was 13.5 grains of powder versus 15 grains.  Reducing the distance between the crimping grooves on this 32-sized clone would mean only "327 Lite" loads could be used, which seems an unnecessary complication. 

Additionally, keeping the loaded cartridge length as close to the 327 as possible seems like a safety feature to me.  Hopefully a long-loaded H&R case would stick out of the front of a wimpy 32 H&R revolver cylinder, and help keep bad things from happening.
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Group Buy Discussions / Re: What about a 358156 but shrunk down for 32s?
« Last post by wheelgun on January 14, 2019, 06:09:07 AM »
I think I prefer #4 drawing but with maybe a little wider meplat.

Why is the 90 degree on the front driving band bad? I understand the lube grooves not being true 90s to drop from the mold easier, but why the angled driving band? Wouldn’t a flat, sharp cornered driving band like on the 358156, or NOE 315-115 swc cut cleaner holes in targets and game?

Also why does the band between the crimp grooves have to be so wide? My 358156 copy measures around .060 (best I can tell), it’s narrower than the driving band, but same as the 3rd band.

Not trying to be argumentative, genuinely curious...
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Group Buy Discussions / Slick sided 200 gr SWC for the .45 ACP?
« Last post by TexasGrunt on January 13, 2019, 11:38:33 PM »
Would anyone else be interested?
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Group Buy Discussions / Re: 41 cal Round Nose for Revolver/Levergun
« Last post by dromia on January 13, 2019, 10:40:57 PM »
Nice bullet but too big for my needs in the 38-40.
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