Great day at the range yesterday.
24 degrees Celsius, hot sun with a bit of welcome cloud cover now and then and no wind.
Just thought some of you snowed in guys would like to know.

Is it finicky with a rimless case?

Well my post had vanished when I went to look for it and only found it again by going into my last five posts.
Best five shot group at a hundred metres one inch using 23 grains ADI  Bench Mark 2 and and a 54 grain home made bullet using a R/F case shortened a bit and a lead tip and a concave base to help smooth out the rim and also move the lead more to the front of the bullet to help form the ogive. 
One in twelve twist.
Standard 223 rimless case and a leupold fixed 6 power scope.
Some of my BSA Martini's eject ok but this one only about a quarter of an inch and you have to use a finger nail under the rim to pull it out.

My post has still vanished for me but obviously not for other people.
Photo enclosed of the extractor.
The one on the right is the 223 mentioned and the other two are for a 222.
I think I remember my local gunsmith saying he had made them himself.
My other 223 extractor is the same or similar and the barrel has a 1 in 8 twist which I used to shoot at 300 metres with 63 grain bullets.
My first Martini 222 of thirty to forty years ago was a rimmed case with a tight chamber and when the accuracy dropped off I had it re-barreled for a rimless case and new wood as with other calibres of an obscure or hard to get calibres I have fought shy of since then.
This first 222 which got me interested in Martini's came with some loaded rounds which when I pulled the bullets from as I have never shot enybody else's loaded ammunition unless I know and trust them I found the bullets swaged down from the case neck and when I asked the guy I bought it from who worked in a gun shop how come, he said as they wouldn't chamber he had run them through the full length sizing die again.

I have four rimless extractors and each one is similar style but all four are slightly differently made.
On your photo for just one instance you can see the spring where as on all of mine you cannot.

Hi Dino, 
like you I also like Leupold fixed power scopes to make it easier loading and unloading
The new photo shows my 7mm Waters which I used to use with the open sights but found I was struggling a bit so put on this Waffen-Frakonia Wurzburg and to show off my very limited German there should be an Umlaut over the first u but haven't got one on my computer, its a 2½ power which I bought on Ebay from Germany. Came with the chunky looking rings and mounts as well. 
Just use my rifles nowadays to punch holes in paper as I find it a long walk these days to even retrieve my targets at 200 metres. 
It has an octagonal barrel and the rear open sight is on the front of the scope rib I had put on the rifle is case I wanted to put a scope on it.
My personal opinion is that all rifles to be used for hunting should have open sights as well as a scope after learning the hard way.

Hi Dino,
for hunting in New Zealand click on this site for the national site of the NZDA which shows all the branches and anything you might want to know about hunting in NZ.
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Regards.