MP 458 SOCOM Thread Three

[jmort]

Third time is the charm, or at least I hope so.
Taking off from the Accurate 350 grain bullet, we have this that can be run as a solid or a hollowpoint. I want both. The penta pin should have serious terminal effect, and the solid will be a hammer. So with no further adieu,

238390

[dkf]

If you want a .458socom specific bullet I'd dump the crimp groove. The crimp groove is going to have to bee seated in the neck on the design in the picture because of the .460" forward of the crimp groove hitting the throat.

If you guys are interested in seeing some more designs I have some I drew up. One being a 341gr (349gr with check and lube) with a small bore rider section for nose support I drew up the other day.

[jmort]

This is the time to get this right. So please input your ideas.
I am determined that we get this right.
Thanks

[dkf]

I'll try to get some drawings up later today.

[hicard]

What is the size of the metplat jmort? I am also interested in seeing your drawings dkf .

[dkf]

Here is a Bore Riding Secant design. The bore rider is .050" long and .445" diameter. Naked weight for the solid is 341gr, around 349gr with lube and check.(wheel weights) Not sure what the different HP cavities subtract in weight but I would say maybe 10-15gr at the maximum for the biggest one. All same bullet in pic. Solid, Gould style HP, Hex HP and the last is an HP I thought up.

https://i.imgur.com/NkOiuvH.jpg?1

[jmort]

Looks good. Like the penta hp, as always.
Thoughts from the members?

[Rick B]

Searching for a 350-400 grain gas check .458 Socom Boolit. Always been real partial to the round nose flat point look of the Lyman Devastator Molds. Real similar to the Nose design JMort has in the first thread.

[dkf]

This is the same bullet as in the first discussion thread with the same HPs as in post #6. Solid should be around 335-340gr. Slightly smaller metplat as the post #6 bullet at .250" and has a radius at metplat.

https://i.imgur.com/cH7oxyt.jpg?1

[dkf]

This is a Bore Riding Truncated Cone. Same HPs as the previous bullets. Solid is 356gr naked, 365gr with check and lube. Bigger .322" metplat.

https://i.imgur.com/2XvQ7i0.jpg?1

[hicard]

I'm ok with either one of dkf's drawings in #6 or #9(my favorite). As long as they feed in a Socom and they should.

[dkf]

This is a Tangent Ogive design with no bore rider with a .304" metplat. Nose reduced to .455" at first band for throat clearance. Same HPs as the previous bullets. Solid is approximately 350gr naked.

https://i.imgur.com/PaGMaZ9.jpg?1

[pmer]

Here is a Bore Riding Secant design. The bore rider is .050" long and .445" diameter. Naked weight for the solid is 341gr, around 349gr with lube and check.(wheel weights) Not sure what the different HP cavities subtract in weight but I would say maybe 10-15gr at the maximum for the biggest one. All same bullet in pic. Solid, Gould style HP, Hex HP and the last is an HP I thought up.

https://i.imgur.com/VIKQBFv.jpg

These look good they are in the 350 grain range with meplats that aren't too big. This is # 6

[jmort]

I am good with any design on this page.

[hicard]

I like #6.

[jmort]

That is two for post #6 aka #13

[dkf]

Out of the four I am leaning towards #6 too.

[pmer]

Maybe we shouldn't put all of our cows on one trailer yet. Hopefully others will chime in.

Does jmort have more info on the design in post 1? I would like 350 grains with the biggest hollow point my self but my heart isn't set on that.

[hicard]

The only issue I have with #1 is the .460 size driving band. I've had issues with oversized driving bands before. Not sure if it will allow the bullet to chamber w/o interference. A little shorter and smaller in diameter might work? I also don't know the size of the metplat (sp).

[pmer]

Yeah I've had where a clump of powder baked on to the wrong spot kept the cartridge from clambering.

[jmort]

I am getting a revision on #1
No crimp groove and reduced diameter out of the case
Any suggestions?
I was thinking. 450" so it could still be coated.
Thoughts?

[dkf]

The bullets in post #12 I based off the bullet in post #1. I just removed the crimp groove (not needed) and reduced the base of the nose to .455" for throat clearance. I can modify any of the drawings with a bigger cup hollowpoint like on the bullet in post #1 if you guys want.

[hicard]

Guess I will check back on this one in a month or so to see if there is any activity.

[pmer]

http://castboolits.gunloads.com/attachment.php?attachmentid=232105&d=1544893487

I don't know how long this link will last but it's a pic of a Lee 458-405 grain HP. It has a shallow hollow point, I guess it's a discontinued mold. He's shooting it in a 458 SOCOM, it has stepped nose / front band area, looks like it would be a great SOCOM boolit.

Maybe the 45-70 shooters would like this boolit too.

239762

[jmort]

I am easy. That looks like a great bullet.
I would take most any of the proposed designs, but there is no consensus, yet.
I like this Missouri Bullet design, needs a little more meplat.
239760
Or Tom's design
239761
Perfect for me.
But I am open.
If nothing happens soon, I wll just have Tom cut two molds, a 350 grain and a 600 grain, and wait for someone to sort this all out and get a couple MP HP molds in the future.
May take a year or more, but whatever bullet is picked, it must be, first and foremost, a .458 SOCOM bullet.
I do not want a Swiss Army Knife design that "could" be used in this or that.
I am very patient.

[dkf]

http://castboolits.gunloads.com/attachment.php?attachmentid=232105&d=1544893487

I don't know how long this link will last but it's a pic of a Lee 458-405 grain HP. It has a shallow hollow point, I guess it's a discontinued mold. He's shooting it in a 458 SOCOM, it has stepped nose / front band area, looks like it would be a great SOCOM boolit.

Maybe the 45-70 shooters would like this boolit too.

239762

He must be sizing that down. That bullet at the COAL it is seated wouldn't chamber in my rifle even sized to .459" with that top band.

[pmer]

He must be sizing that down. That bullet at the COAL it is seated wouldn't chamber in my rifle even sized to .459" with that top band.

It looks it might be a tad long for me too. I bit the boolit and took off that SOTA Arms barrel and installed a Tromix barrel and bolt. Seems like it is much more cast friendly now.

[pmer]

So here is my idea for a SOCOM boolit. It has a .475 nose length and a .256 meplat. It's .926'' long and has .451'' in the case neck. The bore rider is .442 and .110'' long.

Weighs about 366 naked and 375 grains lubed. I drew it up on Mountain Molds. I does kinda follow that Lee 458-405 HP and I like that this one starts out at 375 grains because it'll still have some weight left if the hollow point gets blown off. Compared to how fast a SOCOM can push a 300 grain.

I'm probably going to order this as a flat point. :Fire:

240129240086

I got my throat length from the Tromix barrel and did some math. I made the nose length .545'' and made the front band .120'' long. If I seat the lower edge of the front band of the ver. 2.2 boolit .050 into the case mouth it will have about a .060'' jump to lands. Its base will be about .055'' past the shoulder in the case body and its OAL will be 2.070''. I wasn't too worried about lube capacity because I'll use coatings and the bore rider was changed to .441 to make sure PC clears the lands.

[dkf]

So here is my idea for a SOCOM boolit. It has a .475 nose length and a .256 meplat. It's .926'' long and has .451'' in the case neck. The bore rider is .442 and .110'' long.

Weighs about 366 naked and 375 grains lubed. I drew it up on Mountain Molds. I does kinda follow that Lee 458-405 HP and I like that this one starts out at 375 grains because it'll still have some weight left if the hollow point gets blown off. Compared to how fast a SOCOM can push a 300 grain.

I'm probably going to order this as a flat point. :Fire:

You sure about the .475" nose length? It looks around .375". The Mountain Mold software will include the length of the top band in the nose length. That is what I ran into with their software.

[pmer]

Thank you for catching that, I'll have to play with it some more. I added the second boolit to post #28.

[pmer]

I recieved that 459-375 mold from Mountain Molds. It casts right on the mark. It's 374 grains checked and PC'd. The bore ride diameter had enough room to not interfear with the rifling. Here are some picks if anyone's interested.