411 JDJ in a Siamese action.

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08 April 2025, 13:15

yumastepside

411 JDJ in a Siamese action.

Anyone got one, using one, any info ?....

Roger

15 April 2025, 17:16

snowman

I have a 375-348 Ackley Imp built on a Siamese action. With bullets 270 grs and lighter it gives up very little to the 375 H&H. Heavier bullets have to be seated deeper and compromises powder capacity. With limited overall length in the Siamese action I suspect you are going to have issues with ,411 cal bullets.250,260 and 270 gr bullets shoot and feed great in my 375-348 AI. Hope that helps

15 April 2025, 18:04

yumastepside

Actually I'm developing a wildcat for the Siamese using a shortened 375 HH Flanged Magnum ( rimmed not belted ) shortened to 57mm and necked out to take a 411 pill. Using a 400gr Woodleigh I have a max cartridge length of 75mm, the most you can get in a standard Siamese mag box.
The reason I asked about the 411 JDJ was that it is the closest to what I am making. Case capacity of my version, when filled to the top of the case, is 74gr of H2O....1 grain shy of the 400 Whelen

This is a rough dummy round ....I am currently calling it a 10.4x57... any thoughts ??

Roger

16 April 2025, 04:28

Fjold

What's the shoulder diameter versus base diameter?

It looks like there is room to "improve" that case by blowing the shoulder out more.

Frank

"I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money."
- Robert Ruark, Horn of the Hunter, 1953

NRA Life, SAF Life, CRPA Life, DRSS lite

16 April 2025, 04:46

yumastepside

Yes, thats just a standard case cut down and necked out....I am organising with the reamer maker to take the shoulder out a bit more...this is just a start.

Roger

18 April 2025, 05:31

Uncle Grinch

Reminds me of the 405 Grenadier that Tom is building for me.

18 April 2025, 06:36

yumastepside

My original chamber was the 405G, but then I wanted something more.
I still have Grenadiers original reamer...I moved house a couple of years ago and couldn't find it after the move...moved again recently and its re-appeared, so I'll send it back.

L-R..Dummied up but not fireformed...405G, mine. 411 JDJ...

Roger

03 May 2025, 14:22

p dog shooter

Why this love with.411.

When 416 is a very standard bullet dia. and much easier to get

04 May 2025, 03:51

yumastepside

To each, their own.....I have a 416, I originally went with the 411 because of the 405 Grenadier in my Siamese Mauser, then when I wanted something more, I stayed with the 411 as I already had the Pac-Nor 411 barrel. I'm not a fan of 44's or 45's, except the 45 long Colt, and to be honest, other than buffalo, there's not much in Australia that you need an Elephant gun for.....

Roger