Dual diameter 40-82 revisited

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semtav
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Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 6:17 am

Finally got my ducks in a row so I can test some loads with the JIM403415E
My first try on a shot up gong a month or so ago showed real promise.
So I finally got to put it on "paper"

I switched to heavier paper cause I didn't like the bullet loose in the case like it was with 8 lb paper.


5 shots were just barely over 1 moa at 300 yds.
last shot was with the 8 lb paper and it shot an inch low.



40-82 test 1.jpg
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kwilliams
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Re: Dual diameter 40-82 revisited

Post by kwilliams » Fri May 14, 2021 6:56 am

Brian, that is a darn good group. Is that the refrigerator door "gong". My best group so far in my .40-82 was with the DD bullets you gave me to try. So that's the next mold to acquire.

Kenny Wasserburger
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Re: Dual diameter 40-82 revisited

Post by Kenny Wasserburger » Fri May 14, 2021 7:00 am

Very nice,

It’s definitely working.

Kenny
We'll raise up our Glasses against Evil Forces, Singing, Whiskey for my men, Beer for my horses.

Wyoming Territory Sharps Shooter

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 7:19 am

kwilliams wrote:
Fri May 14, 2021 6:56 am
Is that the refrigerator door "gong".
Yea. Still waiting on my gong hanger to be built and the neighbor to move his cows so I can shoot further , so I'm availing myself to the unlimited supply of doors from the dump next door.

this bullet doesn't quite fit the Crossno chamber in this Browning. Its either .001 undersized in the major diameter for the 8 lb paper or .001 oversized in the minor dia for the 9 paper. I'm having to cam the shell in because the bore section is tight, but sure seems to work.

beltfed
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Re: Dual diameter 40-82 revisited

Post by beltfed » Fri May 14, 2021 11:20 am

semtav,
YOU could use a NOE Nose Sizer to fix that problem with
the 9#paper being tight on the bore ride minor diameter.
beltfed/arnie

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 11:49 am

Thanks I'll have to give that a try sometime and see what it does

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 1:31 pm

I didnt pick this bullet because i have freebore or want to cut down on powder, i picked it to prevent the dreaded Desert Deuce Syndrome.

bruce m
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Re: Dual diameter 40-82 revisited

Post by bruce m » Fri May 14, 2021 5:07 pm

brian,
with a bullet so tight in the rifling that you have to cam the round into the chamber you run a risk.
this is that the bullet can be forced back onto the powder enough to alter powder compression.
this in itself might not matter if it is consistent for every shot, but it might vary.
not only might compression vary, but so also would cartridge o.a.l.
bullets so sized are excellent for breech seating bullets prior to chambering a charged case.
a thing that might help them to slide in is to lubricate the patch.
while this can in some instances enhance accuracy, in others it might do the opposite.
i patched some bullets and applied different lube, and left them on the bench for a long time.
the lube which affected the patch the least was tallow.
this was made by rendering the fat from around a sheep's kidneys, called suet.
it keeps for years unrefrigerated.
ideally, for fixed ammo, it is better to get a bullet mould of correct major and minor diameters with whatever paper you use.
some have found that 8 lb paper shoots better than 9 lb, but others use 9 lb very successfully.
my own thoughts on your bullet situation are that a nice fit in the bore and 0.001" small in the case has a lot to offer if the ammunition can function well, as in the bullet staying in the case while loading the gun.
reason being that the bullet will align well in the bore, and any looseness in the case will allow this alignment to continue right to the base.
bruce.
ventum est amicus meus

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 5:42 pm

Thanks Bruce
I'll keep that in mind. I'm sure you're right about the paper plus I like working with 8 lb way better than 9 lb.

My test on the gong at 800 yards was with 8 lb and it showed almost no vertical from what I thought I could see.

The local slaughterhouse used to save Tallow for me back when I played with that Greasy stuff. I'm sure I've still got some up here somewhere.

bruce m
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Re: Dual diameter 40-82 revisited

Post by bruce m » Fri May 14, 2021 5:53 pm

minimal vertical at 800 sounds really good.
bruce.
ventum est amicus meus

Kurt
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Re: Dual diameter 40-82 revisited

Post by Kurt » Fri May 14, 2021 7:43 pm

Bryan,
Your making this very tempting changing my Browning .40-65. I have a reamer that would match that chamber.
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 8:23 pm

Life would be so much simpler if we were just one gun shooters.
But not near as much fun!!

Michael Johnson
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Re: Dual diameter 40-82 revisited

Post by Michael Johnson » Fri May 14, 2021 9:01 pm

Brian, I am just getting ready to load this same bullet in a 1/14 twist 40/90BN. Interesting reading your initial tests. I too have the same 8# paper, this for a Shiloh chamber. Planning on a full load of 1Fg Swiss.

semtav
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Re: Dual diameter 40-82 revisited

Post by semtav » Fri May 14, 2021 9:15 pm

It'll be interesting to see your results!!

Kurt
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Re: Dual diameter 40-82 revisited

Post by Kurt » Sat May 15, 2021 8:24 pm

semtav wrote:
Fri May 14, 2021 8:23 pm
Life would be so much simpler if we were just one gun shooters.
But not near as much fun!!
I have a friend that keeps telling me, "beware of the man with just one gun" when I show up with a different rifle and load going into a match :D

But it would make life easier.......I think....
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill

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