Where can I buy 375 wcf brass?
Can it be made from another caliber?
How much does it cost?

30/30 brass makes .375, HOWEVER, almost everyone will tell you that it's thinner and should not be loaded to .375 Win pressures. Some argue otherwise. I have no position, just answering your question.

You can also trim 38-55 brass to length. Same argument that Fireball mentions that it is thinner and can't be loaded to 375 Win levels. I've never run a .375 WIn hard enough to notice. I've had two, a Savage 99 I never should have sold and Winchester 94 Big Bore that I just reacquired this afternoon. I'll probably hunt around for some brass but make some out of .30-30 and make up some cast bullet loads that will work just fine.

You can buy .375 Win brass on GunBroker.

It costs an arm & a leg.

Thanks for the help friends.
Does the little 375 round have a favorite powder?
I plan on sighting in the irons dead on @ 50yrds.
Will forsure try to find brass at the local gun shows.
Does Winchester make it once a blue moon like they do the 300H&H,7-30waters,356,307,38-55,etc. brass?

My .375's love RE-7 and H 4198.

RE7

Does Hornady still make the 220gr. flat nose soft?

Not only no 375win. but 35 rem.& 30-30 are off the shelf and unobtainable for the future at all the local gunshops!
Has the world turned upside down?
Other than Hornady does speer or sierra or nosler make a jacketed bullet?
How hard is it to get Winchester jacketed bullets?
I hate to shoot plain lead for fear of leading my barrel...won't lead stick to the copper jacket streaks in the bore groves?
I know Winchester 94,marlin,TC Contender,Ruger#3 and I think magnum research BFR single action revolvers are chambered in 375 win.is this all the guns that shoot this cartridge?

Sierra makes a good 200 grain FP for the .375. Barnes also makes some jacketed bullets in 220 and 255 I believe. I've never shot the Barnes but hear good things about them.

If I had a good supply of lead, I'd be ordering some moulds.....

Per Hornady Website these are temporarily suspended on production.

i've got 150 brand new Winchester cases. PM sent

Let me know exactly what you need, I will dig around and see what I have on hand. In the meantime: http://riflehunter.net/lever-action-elk/

if the cast bullets are sized right and kept to reasonable speed they will not lead your barrel. get some Butch's bore shine and the copper fouling disappears also. I have a 03'springfield 30-06 that has never had a jacketed bullet down its throat. 1000's of rounds and no leading problems.

Also Savage 99. That's what my .375 Win. is.