I have been forming these cases from .303 British brass. The formed brass requires excessive force to strip from the clip when cycling the bolt.
Could any of you collectors measure an original Dutch rim diameter. I think I will have to turn the rim OD of my formed cases. I would like to match the original dimensions.

Thanks

Both of my "live" 6.5x53R samples have .527 rims and .450 base diameters.
My wood bullet blank 6.5x53R has a .523 rim and a .450 base diameter

Mr Datig ( Vol 2 , Cartridges for Collectors , p.28 ) suggests a rim of 0.526" and a casehead of 0.450".

This fits with my examples...

Guys I appreciate the answers.
I have had some stiff feeding with reformed .303 brass at the .525 to .527 dimension.

I guess I need to try a few thousandths smaller to see what they feed like.

I have one piece that is a reload and it is just shy of .525"

SR, whatcha got in 6.5x53r? I have a couple of sporters.

Lee I have a couple of Steyr made M95 Dutch. One is Dutch Navy Rifle (rare) and the other is one of the carbines. Both have been bubbafied.

I have a Hembrug carbine that was redone into an Austrian-style sporter by somebody with a lot of skill; it's the fastest-handling bolt-action I've ever seen. Delightful round, too; I had some 303's and 30-40 Krag cases, but they all split; got some Bertrams, though, that last and last and last. One tip: spray some Drylube on your clips; they'll feed better. Oh, and learn the trick of loading them without bending or springing them. The 160gr Hornadys are terrific, over about 38.5 of H4350--bang/flop on deer out to about 150 yd. This baby feeds 120's and 140's much better than my 1903MS in 6.5x54, too, but the 160's just can't be beat--up to elephant, I hear.
mind yer topknots! windy

Hello Steve,
I found a drawing of the 6.5X53R case on the Spanish collectors site. The drawing show the head has a large radius across it making it some what domed. When we make brass from .303 cases it leaves the heads flat and I think that contributes to more difficult feeding.
The 2 Steyr 1895 designs, turnbolt and straight pull, seem to be the last of the rimmed repeaters probably because of the potential for feeding issues.