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

Roger

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

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

What's the shoulder diameter versus base diameter?

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

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

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

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