Several of the older calibre brass are unavailable new from the
major companies. I keep hearing secondhand stories of someone's buddy has called Win,ect. And was told they were
going to run this kind of Brass this spring. I'm talking 25/20
35 rem , 300sav , 375 win..... Just to name a few. Has anyone
actually contacted companies on this matter?

Why don't you call the companies yourself and see what they say? I believe you are correct that older calibers are scarce and subject to limited runs. I've been on the lookout for .250 Savage, either brass or loaded cartridges with no luck.

I know they produce some of the more obscure cartridges seasonally--my 25-35 Winchester being one of them.

Give Starline a buzz ands see what hey have to say.

The beauty of handloading, if you haven't discovered it yet, is the ability to easily fabricate ammunition from readily available cases. Often only a standard die set is needed. For example:

.25-20. Resize readily available (Star Line) .32-20 and trim as needed. Yes, you will have a small loss if not using a full-blown "Forming Die" set, but you can lose hundreds of cases before you have paid the hundreds of dollars that forming die sets often cost!

.300 Savage. FL Size .308 Winchester and trim.

.35 Remington. You're screwed, but I have never had a problem finding brass or relatively inexpensive ammunition around deer season, even in the West where the cartridge isn't particularly.

.375 Winchester. As long as you aren't loading to the nuts simply fireform .30-30 and trim. Or use .38-55. Starline makes it too!

.250 Savage. Neck up .22-250! What did you think the parent cartridge was?

7.5x55 Swiss. Full length size .284 Winchester and neck up.

9mm Browning Long. Trim .38 Super to .800 with no other change.

What other ones do you need?

__________________
Gunsmithing since 1961

And use quality lube...or end up swearing a lot. I find Imperial or Hornady Unique work the best.

__________________
Trucks and guns.

Wonderful, I might do some of that.... If I have too!

.35Remington. Should be available about every where,especially during deer season.

Hey, just buy the 22/250 brass of choice and neck it up. I have some Laupa brass for my bench grade 250 sav that i necked up from the 22/250 stuff. only one small step in the reloading process

I have had good luck with hard to find brass on gun broker both new and once fired.

I called Winchester. I got very nice guy who really told me
nothing. It was like I got wrong number and got the Capital.
Point of thread was , has anybody else contacted companies
in reguards to brass production for obsolete type cartridge?
And as usual things go amuck, and all I end up with is a short
elementary lecture on forming brass.