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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Thu Feb 07, 2019 11:22 am 
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Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Bob Snapp, 90, the great Gun Craftsman, of

Clare, Michigan, passed away Jan 28th....

He was an esteemed member of the

American Custom Gunmakers Guild,

Being its president in 1992..He liked

working with Martini Cadet singleshot rifles

.Worked with guys testing armor long time ago.

Maybe the 1st to do 20mm.necked down to 50cal

We lost a great friend,,,Ed




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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Sat Apr 06, 2019 2:16 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
.....


It is possible rig up holders for many types setups.,

About shellholder supply for big cases,

RCBS and others make slip in holders for shotgun cases

that can work or reworked for big rimmed rifle cases...

Here are various sizes.......

16ga-- .810" rim,........ 20ga-- .760" rim,....

24ga-- .725" rim,....... 28ga .680" rim....

Ch4d and Buffalo Arms also have these larger shellholders...


We fireform the 416 HSM with 65 gr of medium speed

surplus powder, with rest of case filled with farina

and grits mix, with a play dough plug in the neck.

It is loud, so we shoot it into big container through a barrel size

size hole, so the sound is muffled, so it doesn't deafen us..


It is great getting more companies making 416 caliber bullets,

long target and bore rider bullets. Ed..



....


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Sun Apr 28, 2019 5:04 am 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Wonder if a PTRD with 5 ft long barrel is stable enough

for ELR , rebarrel to 416 and use our 416 HSM, 500 gr bullet ....

.Here is up north guy using 585 HE in a PTRD with inserts,

Light load.....Inserts are in the shape of the 14.5mm case....


https://www.youtube.com/watch?v=jyabm-c ... e=youtu.be


HERE ia video, 585 Hubel Express and water jugs - slow motion

750 gr with 155gr RE17, just a moderate load.....Ed


https://www.youtube.com/watch?v=uXAo1mJqw8Y


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Sat Jul 20, 2019 12:30 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
20mm Vulcan is a big case that works ok, without having

the sides made too thick...They have thinner sides

than smaller cases guys are getting that have the sides

made too thick and won't extract easy or work with high pressures.


Here Barnard P Cheytac bolt that would do for our 416 HSM..Ed......

[IMG]http://www.gunownerstv.com/barnpchey.jpg[/IMG}


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Tue Sep 17, 2019 4:18 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Got guys doing various 416 HEs..

One just built a 416 HE, just been testing it a few days..

And using 168gr of HBMG 475 gr CEB, tested it, in good

conditions, 2 shots at 1800 yards and was within

a 1/4 of minute accuracy...A few shots at shorter ranges

had same accuracy. Ed..


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Sun Nov 24, 2019 9:52 am 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
More about our 416 HSM from BMG brass, and
our 416 HE & 460 HE from our 585 HE cases
Got reamers for 375 HE, 416 HE and 416 HSM,....

460 HE & 460 HSM are all spec'd, got HE reamer
soon have HSM reamer...Our HSMs have a Wea type
radius on the shoulder..

The fellow that set up our 416 HE in an ELR rifle
and got 1/4 min accuracy,
They got some game out west over 1400 yds..
.Here is the gun they set up.
Using a K&P 34" barrel on a BAT action.....Ed

Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Wed Nov 27, 2019 7:58 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
And have got 460 HSM specs setup, the impetus for that is some
asking about one and new great line of 458 bullets CEB now has.

It will hold more powder than the 416 HSM and will get
a 572 gr as fast as 416 HSM gets a 475gr.....Ed..


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Fri Jan 10, 2020 2:43 am 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
The 416s for long range ,416 HE and 416 HSM......

The guys that did the super acurate 416 HE did another

416 HE that has an 8" longer 42 inch K&P barrel..

Used a Stiller action and same load with 475 gr bullet, as in

first gun and and gained about 200 fps with good accuracy.

3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

And loads they used are not the highest speed loads

the cartridge is capable of.... Ed.....

Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Tue Feb 11, 2020 12:18 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
More about he guys that did the accurate 416 HE, they did a
416 HE that has an 8" longer 42 inch K&P barrel..

Used longer barrel and the same load with 475 gr bullet, as used
in the first gun and and gained about 200 fps with good accuracy,.
3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

And loads they used are not the highest speed loads
the cartridge is capable of....Here is picture.......Ed....


Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Mon Jul 13, 2020 8:45 am 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Here is print with chamber reamer specs for the
416 HSM chamber..There are 3 base sizes we have,
depending on actions used. Got reamers for all 3..
Got cases for all of them..
Our cases are public domain, so that is why I post
info and specs. Manson makes reamers I use,,, Ed.
Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Fri Jul 24, 2020 7:41 pm 
Presentation Grade

Joined: Thu Jan 19, 2006 4:02 pm
Posts: 740
Location: Dyersville Iowa
The picture is not showing up.


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Sat Jul 25, 2020 3:53 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Image works if opened in the tab page, why I don't know..

Here is reamer print with chamber reamer specs for
the 460 HSM chamber .Couple guys getting set
to do 38-40 inch heavy 458 target barrels...Ed....
Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Fri Aug 21, 2020 4:38 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
With 40 inch barrel 416 HSM ,475 gr, get 3650, over 13,000 ft lbs muzzle energy.
Got guys getting set to have 38-40 inch 458 barrels made for 460 HSM.Ed..


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Tue Sep 01, 2020 10:37 am 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
More info on this gun, we did it for testing 416 HSM with a rebated rim,
to check in intermediate size actions, with the longer, stronger, bolt lugs, Ed..
Image


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 Post subject: Re: 12GA 3 & 3/4 (From Hell)
PostPosted: Tue Sep 22, 2020 12:48 pm 
Presentation Grade

Joined: Thu Apr 20, 2006 11:28 pm
Posts: 988
Location: Brinton, MI
Here is experimental action for 416 HSM in a heavy
stock....We lengthened port a little, set bolt stop back ,
opened bolt face fit the 416 HSM rebated rim. Ed.
Image
Here is comparison of Montana PH to Pierce action we
modified to use for rebated rim 416 HSM testing..Ed.
Image




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