Thread: Brass shortages - options for serious wild cat conversions ?

Advice, comments and suggestions welcome.
In these times of restricted component availability and often no idea of when supplies might come thru I’ve been brainstorming some creative ideas to wild cat re-size brass that is available. I’ve got a 7mm BLaser Mag and while I have some brass in my stash it won’t last forever. The recent release of 7mm PRC got my hopes up that this might be a source of brass easily converted to 7BM. But alas the 7mmPRC brass is shorter OAL and to shoulder by about 2mm according to specs published. Bugger !
So got to thinking about all the various 7mm and 30 cal derivatives of the parent case, 375 RCM. Plenty of them- 7mmBM, 7 LRM, 28 Nosler, 7-375 and the latest addition to the family, 7PRC. And similar range of 30 cals.
Google & YouTube searches turned up a few guys doing some “extreme wildcat” sizing, some with very flash gear, others with fairly basic set up’s, so decided to give it a whirl. I have a pretty basic reload set up.
Have some 28Nosler 2x fired brass so thought I’d experiment with that to see what damage I could do in trying to resize to 7mm Blaser Mag. Quite a big reduction of about 6mm in COL as you can see in pics below.
Used a 7mm BM FL body die for most of the work, went in small increments 1/2 then 1/3 then 1/4 turn on die to progressively reduce the 28Nosler down to BM. YouTube and Google info said go real slow on the press strokes to avoid collapsing the case, which I did (real slow). Used Imperial sizing wax on body and neck but not too much . Series of photos below shows progress & end result not too shabby for first attempt & certainly seems to suggest it’s do-able if you have time. Have yet to neck turn & FL size.
Hi
28N on the left , case being re-sized in middle & 7BM at right. This is after 5-6 cycles


After another 6 or cycles


Almost there, neck trimmed to length

Annealed and neck sized


Be interested on any suggestions or feed back on this approach from you reloading gurus or engineers.
Starting with N28 is probably not ideal, the 300PRC or 300 BM on paper look like easier options.