200gr 10mm - My mold design - help

[JTknives]

well i have been in search of a 200gr cast mold for my 10mm (glock20) that has a large meplat and a GC. the stuff i love is the 200gr hard cast from double tab. thy use a 200gr WFNGC made by bear tooth. but i could not find any molds for it so i contacted thx997303 and we started designing one. i think i have it where i want it but i could be way off base. so i thought i would see if any one here had any advice. I'm going to get one from mountain molds and then maybe do a group buy if it works out. being a 10mm i have a case length of any where from .981 to .988. but most of the time its between .985 to .988 even though case length is called out as .992 at Wikipedia. so i want to be able to load from 1.245 to 1.27+ COAL. as a lot of loadings for 200gr say 1.245 OAL. the 10mm is 1.25 to 1.26 but the double taps are seated at 1.245. so any way i set the nose length to .250 so when its seated to 1.245 in a .988 case it will have about .007 in front of the case so the crimp does not set the bullet back. now if i loaded it in a .992 long case i would still have like .003 in front of the case. i have it set for a 80% meplat, well how about i just post a screen shot of it. the thing is this, the bear tooth 200gr from double tap has a crimp groove but we removed it in this design because I'm running it in an auto loader and i thought we did not want a crimp groove because i factory taper crimp not roll crimp. so if you can look it over and give me some ideas that would be great.

DELETED THE IMAGE, bad design

new bullet design just a few posts down

[Maine1]

I like it, and do want a 200 gr 10mm bullet, but i wonder if that puppy will feed?

[JTknives]

my one concern is to what size do i have to mold made to. its set at .402 but that's what i will size the bullets to so how much bigger should i go?

[JTknives]

OK its re tweaked back to what it was before i went all meplat crazy.

DELETED THE IMAGE, bad design

[Blammer]

JT, if your going to get a custom mould you may want to slug your barrel.

You may also want to try to get some "fatter" samples and see what will fit in your chamber too.

I'd think that would be a good starting point.

[JTknives]

O i would like to publicly thank Blammer for staying up with me till 1am his time to help me sort out this bullet non sense. he corrected my error. and now i have just the bullet i was looking for. i was inputting numbers wrong and thought thy meant something different then thy did. man this looks like a sweet boolit. im going to delete the other 2 boolits as thy are bad and should not be used.

http://www.jtcustomknives.com/calendar/files/1/bullet%208.jpg

[sqlbullet]

Good luck. I bought a used Mountain Mold 10mm 205 grain about a year ago. I have been very happy with them. I seat them 1.260" and they feed fine in both my Witness' pistols.

http://www.fellingfamily.net/images/MM_205_FRN.jpg

[casterofboolits]

Take a look at the Saeco #047 40/10mm TCBB mold. Not a GC, but works well.

http://www.midwayusa.com/viewProduct/?productNumber=432709

[mag44uk]

I have no interest in this as such,but am intrigued as to why the gascheck?
It may be a redundant feature considering its use.
If I was getting into 10mm (again!) I would look at the aformentioned saeco mould too.
(Assuming it meets the required cast diameter)
Just musing.............
Tony

[JTknives]

sqlbullet; what is the OAL of that boolit? and do you use the crimp groove?

I like the truncated cone bullet but not what i was looking for in this round. meplat is to small ;) and its a 150 bucks.
There is just something about having a custom mold made :)

[mag44uk]

Have a look in Vendor Sponsors at NOE`s catalogue.
There is a non GC 195gn large meplat 40 cal.
You would have to start a small GB of 5 to get one though.
HTH
Tony

[JTknives]

Have a look in Vendor Sponsors at NOE`s catalogue.
There is a non GC 195gn large meplat 40 cal.
You would have to start a small GB of 5 to get one though.
HTH
Tony

we make some of the tooling for them here at my shop in provo utah, that bullet is around .025 longer then my design, and it has a crimp groove

[thx997303]

I hate when this happens.

Lengthen the nose, Of course!

I feel dumb.

I still like the steeper groove angle, it gives you a bit more lube capacity.

[JTknives]

how much lube is needed for a pistol barrel 5.2" long?

[thx997303]

Depends entirely on the gun, and the lube.

Some lubes, you want more, some not so much.

I just prefer the wide range of capacities I can get by having multiple deep lube grooves.

[Maine1]

I like that bullet. I also question whether it really needs a gas check. Keep us posted on this project, i amy want a mold if it turns into a group buy or suchlike.

[thx997303]

Maybe it does, maybe it doesn't.

Some people have trouble shooting plain base above 1300 fps. Some don't.

I was shooting with JTknives the other day and his loads chronoed at 1500 fps or so.

So, yes, no, maybe. That's entirely up to the gun and shooter.

If done as a group buy, there will be an option for plain base.

But let's let JT run em through the wringer first.

[thx997303]

Oh, and JT, since your barrel slugs at .401" up the boolit size to .403"

That will prevent you from having to beagle or alter your mold later.

[Intel6]

I was looking for the same thing and ended up with a mould form Veral at LBT. I am not sure what more you are looking for as far as metplat? You may not need to mess with designing a new bullet, just get a 200 WFNGC from LBT. I haven't measured the metplats on the two WFN's but I think the LBT is wider?

In the Pic below:

Pulled 200 WFN GC bullet from a DT round
225 WFN GC from my LBT mould sized with a GC but no lube
200 gr. bullet from my Lyman mould with only one lube groove filled

[sqlbullet]

JT, I don't use the crimp groove. They guy I bought it from did, but ended up with bullets too long for the magazine on his 1911 10mm.

I will check the length tonight when I get home.

[sqlbullet]

Well, sorry about 'tonight' becoming 'next Saturday morning'.

Mine are .655" long according to my Lyman dial caliper.

[JTknives]

Well, sorry about 'tonight' becoming 'next Saturday morning'.

Mine are .655" long according to my Lyman dial caliper.

is that with or with out a GC

[Dannix]

I like that bullet. I also question whether it really needs a gas check. Keep us posted on this project, i amy want a mold if it turns into a group buy or suchlike.
Maybe it does, maybe it doesn't.

Some people have trouble shooting plain base above 1300 fps. Some don't.

I was shooting with JTknives the other day and his loads chronoed at 1500 fps or so.

So, yes, no, maybe. That's entirely up to the gun and shooter.

If done as a group buy, there will be an option for plain base.

But let's let JT run em through the wringer first.
Another aspect -- home made Aluminum GCs aren't exactly going to break the bank. I'm still too paranoid to try Al GCs in the family rifle, but I wouldn't hesitate for expendable pistol barrels.

[thx997303]

Speaking with JTknives the other day, it seems he himself is questioning the need for the gas check.

I've run 1750 fps with plainbase with no problem at all. I personally think the 10mm is not in need of the gas check shank.

[Blammer]

My thoughts are, if you want high velocity and want to shoot a "softer" boolit a GC makes this an easier possibility.

[thx997303]

I could imagine that if it were a hollow point. However, for the purposes this boolit is intended, I couldn't imagine a soft boolit being needed.

You have a 40 cal round that goes 1300 or so FPS and is 200 gr.

At this point, I can't imagine expansion being the goal, but penetration.

In which case, a softer boolit is not so desirable.

And we also need to define "softer" because the alloy I used to go 1750 fps in my 45-70 was 50/50 WW/pure.

I got no leading with that whatsoever, but I did get a lot of unburnt powder kernels. Turns out H322 wants a little more pressure.

I think we're just confusing JT on this issue though. :shock:

[JTknives]

not confused any more, MY MOLD IS DONE AND FINISHED AND SITTING IN MY HAND as we speak. now to get some handles and fit the mold to them.

[Dannix]

So where's the pics? :D

[thx997303]

http://castboolits.gunloads.com/showthread.php?t=89838

[George Rome]

What do you think about Speer gold loaded with 200 grain HP that I get purchased from Rocky Mountain Reloading pulled bullets he said that he has never ever seen them in 200 grain Gold Dot loads, I don’t know where he got them but he only had 9000 I purchased 2000. I think I may get close to the original Norma Loadings, I will conduct my Ballistic test to see what I get for maximum & penetration & post the result does anybody recommend a recipe I was thinking 1.260 OAL X800 or blue using 350 mag primers?