At this stage no 7mm PRC brass in NZ, otherwise I’d give it a try.
At this stage no 7mm PRC brass in NZ, otherwise I’d give it a try.
Neck turned and final? FL size. Might need to bump shoulder slightly further ?
will it chamber??? will answer that question...
75/15/10 black powder matters
Looking good
Not quite & don’t want to force it. I have FL sized using my normal FL die settings which I’ve used for regular Norma 7BM brass but feels like I need to wind the die down another 1/4 turn or so, and bump the shoulder back a tad more. Thicker brass in the shoulder area now given I’m well into what was the case body walls of the original 28N case.
Thought about starting with a LRM case?
Yes, thought about lots of different 375 RCM derivatives. Had N28 in hand so thought I’d give it a whirl to see what I could learn and achieve with a basic reload set up. Ideally I’d start with something closer to the 7BM dimensions. Any one got some 300 PRC or 300BM brass I could get a case to try?
https://www.nzhuntingandshooting.co....um-info-42743/
That’s the image I had burnt in my brain in terms of LRM to BM being fairly close in size I don’t have any of those 30s to send sorry I’m sure someone will chime in who has one
Thanks @Kelton, the 7 LRM looks like a good candidate & so does 300 Norma.
Good work Chainsaw.
Even after neck trimming I expect you will get doughnuts, requiring inside neck reaming. I think you will also need to trim neck length every time as there is a lot of brass to flow in the neck and shoulder.
Hope you get it going.
From memory 7LRM is a derivative of 7-375 Ruger, but the resizing is also a multi-stage job.
The member formally known as Spitfire
Yep,you’re right. 300Norma is a 338 LM bolt face which I realised once I checked the Saami specs. bugger ! But hey a 300Norma necked down to 7mm would make one very interesting wildcat.
If you have a 7LRM case or two to spare I’d love to have a go at resizing that.
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