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Author Topic: Truncated cone design for the relatively new 350 Legend  (Read 8754 times)

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #15 on: September 05, 2019, 04:27:59 PM »
Thanks again, cornmastah!
It's funny, I've posted images right through the site interface before with no problem. But if using an image hosting site will work, then I'll use it in the future.

I think this one's potentially viable. Any commentary?

cornmastah

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #16 on: September 05, 2019, 05:37:56 PM »
No need for a crimp groove though, right?  Since the cartridge headspaces of the case mouth.

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #17 on: September 05, 2019, 06:26:52 PM »
Yup. That'll be gone in the next cut.

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #18 on: September 05, 2019, 07:58:04 PM »
Here's pass three - this leaves 0.05 from max length.

As told in the link Eagle Eye posted, there are currently many variations on bore size. Notice the first band in from the nose is meant to act as a bore rider (the software just put that in, I'm not smart enough to think of that!). We may want to consider making that as large as possible so that fellas can nose size to their particular bore.






tmaloy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #19 on: September 09, 2019, 04:52:22 AM »
Looking good there guys.

tomme boy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #20 on: September 13, 2019, 08:11:38 AM »
Cut the lube groves by a 1/3. It will still have plenty of lube with two of them. The larger bearing surface will help it trying to skid on entering the throat.

tomme boy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #21 on: September 13, 2019, 08:20:02 AM »
I drew up a design over at accurate. 36-180LG. I did this from the prints of the chamber and cartridge. Once I get a barrel and do a pound cast it may change a little.

I have not ordered it yet. I am still gathering parts for the upper.

Just something for everyone to look at. I am pretty sure I will be PC the bullets. Al can use this if he wants.

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #22 on: September 13, 2019, 12:51:46 PM »
I went over to Accurate and got the URL for your design. Hope you don't mind.
It is somewhat close to what we already have. Make the changes you suggested and it's just about identical.
I'll make the changes and see where ours comes out.

Modified this post so that the image is smaller and moved the image to my imageshack account.


« Last Edit: September 21, 2019, 12:58:04 PM by AlvinYork »

tomme boy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #23 on: September 14, 2019, 06:43:46 AM »
One thing I noticed on your design, the top lube grove has a 2 diameter band. You will end up with a mess with the lube overflowing that way. You need to have both bands the same diameter. Unless you are PC them then it don't matter.

If you look at the way I did it then you will understand why the placement of the 0.350" is where it is.

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #24 on: September 17, 2019, 10:23:56 AM »
I can't get the tool to replicate the design in a "clean" way. I can get it there but then there are messy lines all over the place. Maybe we'll just use your design. Looks good to me. The only thing I would have wanted to try is add in an extra 0.030 to the nose (and take 0.015 from each of the bands to make up for it) to get it out to 0.45 which would put the entire length of the cartridge to 2.26, max for the AR.

So, let's go, fellow lead slingers, sign up now for a terrific bullet!

I'll take a 5 cav, GC and a brass 4 cav, GC, RG4 if we're going to make this a HP as well.

tomme boy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #25 on: September 18, 2019, 02:28:54 AM »
Lets see what Al says first. It needs to be drawn so it comes out at 0.357" for the diameter. I am sure Al can do this.

But I am in for a 4 cav al gascheck

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #26 on: September 18, 2019, 11:30:04 AM »

Ok, here ya go. There's one glitch but I think it's there.




AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #27 on: September 18, 2019, 01:33:38 PM »
Now that I've taken a step back to compare these the one I put up has an extra lube groove. Personally I like lots of grease on my cast bullets, keeps the bore nice and shiny. So it's ok by me.

AlvinYork

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #28 on: September 18, 2019, 11:40:47 PM »
Apologies for that last post, I was getting frustrated with the software.
Anyway, I think this is what we were after. . .
It seems to only come out to 168 with wheel weights. What alloy did you have in mind for the 180 bullet, tomme boy?




tomme boy

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Re: Truncated cone design for the relatively new 350 Legend
« Reply #29 on: September 19, 2019, 03:46:01 AM »
Looks good

 



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