Reforming Dutch manufactured .303British to 6.5 Dutch
This is my first post in here, so I thought I might as well post about a Dutch rifle and "Dutch" ammo.
https://www.milsurps.com/images/impo...IMG_2152-1.jpg
Dutch Steyr Mannlicher M95 rifle with early bayonet.
This post is about reloading for my Dutch Steyr Mannlicher M95 rifle again.
I usually use .303 British Boxer cases and reform them to 6.5x53.5R.
This time however I decided to try the Dutch .303 British cases.
These were manufactured by AI (Artillerie Inrichtingen) in 1959.
AI was the Dutch State Weapons and Ammunition Factory.
The quality of the brass is great.
Problem is that these are Berdan cases and don’t use the 5.5mm (0.220”) Berdan primer, but the larger 6.34mm (0.250”)Berdan primer.
https://www.milsurps.com/images/impo...SDC11334-1.jpg
Uncleaned Berdan primer pockets of the Dutch .303Br brass
Not only the 6.34mm, but also the slightly larger 6.45mm (0.254”) Berdan primer fit in this primer pocket.
You not only have to check the diameter, but the height of the primer is important too.
Both Berdan primers have a different height, but both fit the primer pocket of the Dutch AI case.
I already reformed the cases and trimmed them back to 53.45mm (2.104”).
The Dutch AI cases didn't fit the chamber so I had to adapt the diameter just above the rim by 0.06mm.
https://www.milsurps.com/images/impo...SDC11338-1.jpg
6.45mm Berdan.
https://www.milsurps.com/images/impo...SDC11357-1.jpg
6.34mm Berdan.
The guy who sold these to me used the primers for his Lee Enfield.
After that it’s priming the cases.
Because of the size of the primers I have to use an adapted shell holder and an handmade primer device .
A good friend from the US made these for me a couple of years ago for which I’m still grateful.
https://www.milsurps.com/images/impo...SDC11342-1.jpg
Adapted shell holder and handmade primer device.
https://www.milsurps.com/images/impo...SDC11336-1.jpg
Left: Dutch .303Br parent case.
Right: Reformed to 6.5x53.5R Dutch (notice the adjusted diameter above the rim)
https://www.milsurps.com/images/impo...SDC11344-1.jpg
Time to prime the cases.
From here it’s just business as usual.
Fill up the case, place the bullet and off to the range.
https://www.milsurps.com/images/impo...SDC11359-1.jpg
Ready to go to the range.
Here’s the loading data:
Brass: Dutch Berdan .303British reformed to 6.5x53.5R
Primer: 6.34mm and 6.45mm Berdan primers by Dynamit Nobel
Powder: 13.8 grains of VihtaVuori N110 (reduced load)
Bullet: 160 grains cast bullet in cal .266
Met vriendelijke groet,
Martin
Neck sizing saves cases AND (usually) improves accuracy
Congratulations on your work, Martin. It is good to see someone taking some trouble to get the old bangers banging again.
Quote:
Originally Posted by
xa-coupe
I used to FLR everything but as it is getting more expensive to buy things I am going to have to work on prolonging case life, so neck sizing will be on the cards. I will have to start separating the cases so I don't mix them between rifles.
Neck sizing not only prolongs case life - it also often makes these old rifles shoot better! Resizing dies have to be made so that the die + manufacturing tolerance still produces cases that will chamber in the minimum chamber as per CIP or SAAMI. If you look around the forums, you will find many instances of shooters complaining that the dies are too tight for the bullet diameters that they need for optimum performance in their rifles. So I sometimes use a die for a different caliber to get a better neck size than the "official" set.
The best for maximum case life AND performance would be if your optimum bullet requires a neck size that is exactly that which you get from the spring-back of the neck after firing - the benchrest ideal - then you would need not sizing at all, as the brass would be working within its elastic limit all the time! We are using old service rifles, not benchrest equipment, so it is not possible to do this with all rifles - but the closer you can get, the better.
Patrick
:wave: