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Is there any truth to the theory that a straight walled cartridge gripps the chamber and applies less thrust onto the breach? This would also reduce the "stretching" of the action and back slap.

The box is milled, single piece.

I missed posting the photo of the tool & cutter grinder setup.

The Siamese Mauser magazine spring is anaemic. The P14 & M17 have much more force and I will try to swap one into the Siamese Mauser.

Below are a couple of photos of the feed rails and cartridges. I believe that I need a little more margin with the cartridge shoulder. At some point I thing the shoulder point on the feed rail and magazine needs to be moved forward - any feedback or opinions appreciated. With the projectiles...

The Sambar are no problem as they are browsers, and if anything are benefical as they eat the woody weeds- plus they are good eating. The Kangaroos being native and given they directly compete with the cattle are a much bigger problem. There are government licenced hunters that can cull the...

Can anyone help with a photo?

We run a beef farm that backs onto state forest. In the last couple of years a family of dingoes has taken up residence. They are giving the kangaroos and Sambar deer a bit of curry but they are ignoring the larger Angus cattle. The cattle show no concern and no interest when the dingoes are...

The 416WSM barrel is in the action, that is how I was able to check the feed function mentioned earlier.

Personally I find the treatment of that wolf abhorrent. If you are going to take an animals life then do it as humanely as possible. Then the jerk is stupid enough to post the video. In this day and age you need to be very careful what you post online. Reguardless of what we think, it is what...

I did get some time this afternoon to start on a new bolt handle for the SM. I really like the modified bolt of my P17 & P14, as the knob is right out there and easy to grasp. Rather than just bend the existing one down I am going to weld on a new longer bolt handle. More work to do with...

The logic behind why I thought the Siamese Mauser would be a suitable doner for a WSM based cartridge is that the rim diameter of the Siamese 8X50R is 0.555" and the base diameter of the WSM is 0.555" = identical. I did not believe I would have to touch the rear of the guide rails. The shoulder...

The Siamese Mauser is a typical Mauser 98 and has a stacked magazine. Early days but with only 3 rounds in the magazine, if the bullets are seated down to the cannelure then the feed is not 100%. But when the bullets were seated out per the photo they feed without issue. Extraction has not been...

Equally most of my hunting is Sambar deer, but really, this is not about logic, its about the passion of trying something. I don't need both a 416WSM and a 416/348AI, but I can. At least with the Martini I don't have to worry about feed issues. If I have 3 cartridges in my forehand, I am almost...

The Siamese 8X50R had a rim diameter of 14.12mm and the WSM is 13.6mm, Below are some photos of the Siamese bolt along side my P14 that is in 9.3X64B. I have included some close ups of the markings on the extractor - I suspect it was for some form of rimmed cartridge as it had an extreme ramp...

Hi Skydiver I am planning on doing all the remaining work. I have done the bolt handles both my Enfields (P14 & P17) and Mauser 93. I want to try making a 2 position safety, hopefully a doner K98 bolt shield will fit the Siamese bolt. Hinge the floor plate and all the barrel fittings. Then the...

This all began about 30 yrs ago when I acquired 3 large Martini actions in various states of disassembly. I managed to salvage 2 working actions out of it. Back then I barreled one of the actions to 45/70. This is one of my favourite rifles, it points like a shotgun and with its 22" barrel is a...

Hi Velo Dog. Yes they are great actions, but mine are a little underutilised as you can fit any cartridge you want in it. The P14 was a problem to get it to feed the 9.3X64Brenneke. With a plain box it would feed most of the time, but not always which is not what you need if it gets hectic. The...

Thanks for the feedback, I will open a new topic on this build so as not to highjack this series. The Siamese Mausers had some bad press early on, but I think that was more to do with its origin being Japanese and the hostilities of the then, recent past. My action is a mid 10K serial number so...

Hi I have been hunting since I could walk. It started with rabbits and has progressed from there. I am a rifle hunter and most of my rifles are custom builds. That is where my passion is. I have a number of Martinis in 22Hornet, 222Rimmed, 45/70, 45/100 and the current build is 416/348Ackley...

Hi I joined this site specifically because of this topic. I am currently building a 416WSM on a Siamese Mauser action. It is a bit of a convaluted story. Which started when I purchased 3 stripped Martini Enfield actions in the 1990s. I managed to get 2 working actions out of it. The first I...