MP mold for 45 ACP question

[ChestnutLouie]

(moved from the end of an old thread)

I received the MP 452-374, 230 grain round nose with no lube grove. WOW what a nicely made mold. I cast a few pounds and did not tap the mold even once, they all fell out when I opened. But I have questions.

Bullets cast from the MP mold are .695" long

with a COAL of 1.270" for the MP mold so there is about .339" inside the case

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Bullets cast from my LEE 230 grain tumble lube round nose are .665" long

with a COAL of 1.267" for the Lee mold so there is about .290" inside the case


The recipe that I used for the LEE bullets is from the LEE book @ 6.5g to 7.0g of 800X with a coal of 1.200" (Federal Large Pistol Magnum Primers)
the velocity difference between magnum and regular primers is slight and I have more magnums

I am using 6.6grains of 800X (at the low end)

What are your experiences / thoughts on the safety of the MP bullets at this COAL? I am concerned about how much of the bullet is in the case.

These will be fired out of a Hi-Point Carbine.

thanks
Francis

 

[RBHarter]

If the HP carbine I had was an example as long as it will fit in the magazines and isn't too +P+ you won't have any trouble with it . I ran a 200 gr RN from Extreme , 452-200 RF , the H&G #130 , 45-200 , NOE version 454424 , 425-255 all over 5.5 Unique seated for the mag length because OAL isn't a big deal in the revolvers . I have a 453-350 Mountain Mould but that seems excessive......
I just ran what I had loaded and wanted to burn up for the 1917 .

 

[358156 hp]

The MP mould has a more elongated nose than the LEE. I have that mould, albeit with a lube groove. Seat to feed reliably through the magazine, determine your load from that point. LEEs data is the same as Hodgdons, and 7.0 gr is their maximum recommended charge for a 230 gr, and by their data is not a +P load. If you want a shorter bullet from that same mould, the RN nose pin is reversible, and that will leave you with a slightly lighter RFN profile. At least this works with my copy of that mould.

 

[ChestnutLouie]

I am using 6.6grains of 800X which is at the low end of the recipe. The first few I made with magnum primers as that is what I have the most of.
Do you think that they will be safe with the light charge and magnum primers?

I hand fed four rounds using the LEE bullet, 6.6g of 800x and magnum primers and they were fine with no primer flattening --- its the extra seating depth that I have questions about.

thanks
Francis

 

[358156 hp]

I think you're in fine shape. It seems that every mould produced has some minor variances, and you're almost a half grain below max for that combination. As long as your ammo feeds and fits, I don't forsee any issues with the information you've furnished. Take it out shooting!

 

[ChestnutLouie]

I tested with regular primers 950fps, 16fps max deviation
magnum primers 980fps, firmer recoil.. I'll stick with regular primers for this load.

 

[ChestnutLouie]

FYI

 

[fiver]

i'm off the top of my head seeing pretty much a 6.5% or so reduction in case capacity.
your already hanging out that much below max with the other case capacity and load.
so at the worst your barely near the top with the new bullet.

 

[Bret4207]

FYI

Powder coating design?

 

[ChestnutLouie]

Yes I powder coat them.

Funny that Eastwood Ford light blue gives a perfect coat but Eastwood Signal white gives an uneven coating even though they are evenly coated before I put then in the oven???

 

[CWLONGSHOT]

Thats just what White and Yellow does.

Remember what most of us do with powder coat is NOT how it was designed.
If we would be using a rack and gun this would not be the case.

CW

 

[ChestnutLouie]

FYI - I installed a Vortex Crossfire red dot today and went to the range to sight it in. Shooting from a rest at about 25 yards, I first adjusted for best groups with the Lee 230 grain TL RN bullet on the left hand target (three rounds). I then fired six rounds with the MP 452-374, 230 grain round nose (actually weighs 240 grains). The MP bullet mold gives a tighter group but its about 5" to the right. Why? I'm just curious how this happens.
Its not a problem as before to long I will shoot-up all of the LEE bullet ammo and will use the MP bullet ammo exclusively.

Thanks
Francis

Remember this is out of a Hi-Point Carbine

 

[fiver]

why?
cause it's a gun.
i've moved enough bullets around from the same gun enough times all i can chalk it up to is the weight.
it just takes a moment longer or a moment less and the barrel is doing something different when the bullet gets to the end of it.

the good thing is you ain't getting 2 or 3 different groups with the same bullet, that's when life sucks.