433-415GC Huckleberry

6pt-sika
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433-415GC Huckleberry

Postby 6pt-sika » Sun Apr 21, 2013 5:33 pm

Dan ,

Mt Sourdough from Arizona told me had a mold cut by you recently that he calls the Huckleberry .
He also told me you kept the design in case someone else contacted you and wanted a copy . Is it possible for you to post it here ?

mt_sourdough
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Re: 433-415GC Huckleberry

Postby mt_sourdough » Sun Apr 21, 2013 6:21 pm

Hey 6pt, Dan told me that I changed the numbers too many times, such that he doesn't have a clear memory of where we ended up, so I'll post the numbers as per Dan's request.

Numbers, as ordered, look like this
Weight - 420gr
Alloy - Wheel Weight
Nose - Secant
Crimp Groove - .055"
Bullet Dia. - .433"
Front Band Dia. - .431
Front Band length- .050"
Nose Length - .275"
Meplat - 80%
Base - 0.4" Straight Shank for Hornady-Gator 44, 7.5gr
Length of base - 0.060"
Groove-to-band - 0.7
Groove angle - 55
# of bands - 6 bands

I hope this helps.
Last edited by mt_sourdough on Sun Apr 21, 2013 8:28 pm, edited 3 times in total.

mt_sourdough
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Re: 433-415GC Huckleberry

Postby mt_sourdough » Sun Apr 21, 2013 6:43 pm

I am seating the above bullet with a COL of 2.495". At that length, it just slips into the loading gate and then it cycles, chambers, extracts and ejects very smoothly. The front band is seating nicely in the throat and nice light kiss by the lands.
The load development, so far, is only with RL7. I am finding 35 and 38 gr of RL7 lloking like sweet spots so far. 35gr is giving me a little over 1700fps and 38 gr is getting me about 1840fps. My two groups of three shots with 38gr were .4" at 50 yards and 1.25" at 100. I am improving some things in the loading process that should lead to improved accuracy.
I am using the Lyman M die and I believe that really helps me get these bullets stuffed in the case without getting cock-eyed.
Old Huckleberry design next to new Huckleberry. Notice how much further the front drive band is out in front of the crimp groove.
Image

In this pic, the Huckleberry stands next to the Beartooth 405gr WLN DCG and others for size comparison. L-R- Hornady265FP, Hornady 300gr XTP, Barnes Buster 300gr, Ranch Dog 432-350, Hornady 265 FTX, Beartooth 405gr WLN DCG
Image

50 yard group with 38gr RL7
Image

100 yard group with 38gr RL7
Image

mt_sourdough
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Re: 433-415GC Huckleberry

Postby mt_sourdough » Sun Apr 21, 2013 8:31 pm

I just wanted to say that I changed a couple of things in the Huckleberry numbers posted above. After posting, I realized that I had a made it a 6 band bullet with 55 degree lube grooves. I cant honestly say why I chose 6 bands as opposed to 5, but they both will work about equally well I reckon.

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mtngun
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Re: 433-415GC Huckleberry

Postby mtngun » Sun Apr 21, 2013 8:35 pm

Thanks for posting your results, Sourdough.

Here's the design based on the specs you posted.
Image

6pt-sika
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Re: 433-415GC Huckleberry

Postby 6pt-sika » Sun Apr 21, 2013 9:01 pm

So this new ones got a slightly shorter nose then the one you traded me ?

Also the one I have now drops about 8 or 9 grains heavier ?

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Re: 433-415GC Huckleberry

Postby mt_sourdough » Mon Apr 22, 2013 7:38 am

6pt, the biggest difference between the one you have and the new one is .025" difference in nose length. That difference is huge in function. Seating a bullet deeper is no substitute for proper nose length. That is why I changed it so many times. I am not a geometry master or mathemagician so I had to test, measure, test, measure, over and over again. I was going to go as low as .255" and that is what I originally ordered from Dan, but I was able to get him to change the length to .275" and change the meplat from 70% to 80%. I was starting to resize my dummy round with the old bullet after you reminded me of that little trick and it helped.
When the new bullet arrived, I loaded it with a COL of 2.5" and it hung up a little at the loading gate. I knew it was close, so I set it to 2.495" and it worked. It cycled, chambered, extracted and ejected in a way, no other 400gr (plus) bullet had worked for me to this point. No re-sizing or trimming case or anything of the sort. Just load and crimp at 2.495" and it works so well that it makes you wonder why it was so difficult before. I have loaded it through two 444 Marlins. My '07 SS and my 99 P.

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Re: 433-415GC Huckleberry

Postby mt_sourdough » Mon Apr 22, 2013 7:48 am

One more thing. I noticed in your data posted, you used a 45 groove angle. The new bullet I have used a 55. If I were to do it again, I would use the 45 degree groove, like in your data, because there is plenty of lube, but a savings of .007" of length inside the case.

Oh, yea, the weight variance. I cant explain it. I ordered a 420gr but it is weighing in at 415gr. I used two different alloys and both times they finished up at 415gr. It could be the alloy yet or it could be my digital scale with which I weigh bullets. The scale may need to be checked.

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mtngun
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Re: 433-415GC Huckleberry

Postby mtngun » Mon Apr 22, 2013 12:57 pm

5 gr deviation on a 420 gr. bullet is 1.2%, easily explained by alloy. 8-)

Scott's bullet dropped out 416 - 417 gr. with my WW alloy, sans check and lube.

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Re: 433-415GC Huckleberry

Postby mt_sourdough » Mon Apr 22, 2013 7:08 pm

mtngun wrote:5 gr deviation on a 420 gr. bullet is 1.2%, easily explained by alloy. 8-)

Scott's bullet dropped out 416 - 417 gr. with my WW alloy, sans check and lube.


I'd go along with that. Right now, I am just so jacked to finally have a fully functioning 400gr (plus) bullet that is meeting all my expectations. I told 6pt that I have my mind set on a 445gr version that I'll call the 444 Hamfist.


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