I have a shortage of 257 Roberts, 280 Rem, and 375 H&H brass. Of the ones on the market, which brand of brass do you think is the best and why. Thick/thin/soft??? When buying new or once fired brass, what would you buy?? I'd like to know your thoughts.

I am always looking ahead for brass. I only buy when I get a smoking deal. The brand does not matter a lot to me. As many calibers as I shoot I cannot afford to be be that choosy. I buy a lot of once fired rifle brass. In some calibers there is not a big choice. Condition of the brass that I find is more important and varies more by how it has been handled and what it was fired in. I like brass that has been fired in the same rifle (one that has good headspace) all the same heads stamp that I can sort through.
Brass from indoor ranges that has never been on the ground is much preferred to the stuff that has been in the dirt.
I have learned a bit doing all of that brass sorting. For one thing Rem 6mm and 25/06 are the most likely to have blown primers with factory ammo. I think they are just loaded really hot. I have also found a blown primer in a factory loaded Norma 7X57.

For your choices .257 Roberts is easier to find in WW. The .280 is primarily a Remington only case. The .375 H&H has been discontinued by WW so Remington is the only game in town unless you want to pay for premium brass. In lots of 100 to 500 though it gets pricey.

Winchester cases are usually lighter and a little harder but my loads are usually so mild it does not matter.

I used to buy the cheapest brass and then I tried Nosler brass. I couldn't be more pleased. The flash holes were already turned, the case mouths chamfered, etc. I've also loaded some probably 10 times for a 300 Weatherby Mag. (neck sizing only) and have not yet had to trim any cases. I'll be buying more Nosler brass.

I purchased some Remington 375 H&H brass last month. It is very disappointing. I tried it to see if it is a viable alternative to the much more expensive Norma. It is not. Seems way too soft and not well finished. Chamfering and deburring lead to chipped case mouths. Probably will work okay for plinking loads but I just bought more Norma.

I also second Grumulkin's comments on the Nosler brass. It is outstanding and well worth the money.

223 wasn't mentioned in the original post, but I recently bought some WW 223, and it is very good quality. I was very pleased with it. Amazingly uniform and especially for the price. I will by more WW brass but not Remington unless I have to.

LWD

I use Norma if it exists. Otherwise Lapua. So close in weight that you do not have to weigh them. That reflects quality and pride in manufacture. That means they are more likely of high quality right dowwn to the flash hole. You will not see that in the "work" of REM or WIN.

The best? Dont listen to me, listen to the nit picks that are the benchrest crowd.

I prefer WW brass for my .280 Rem's as well as for fireforming for my .280AI.The nickel finish has never flaked and has not bothered my dies at all. Monashee

I buy Lupua, Norma, or I like Hornaday basic mag brass. In the overall scheme of things, good brass is cheap.
Butch

Depends. I use Winchester in most of my chamberings (22-250, 30-06, 7mm Rem Mag, 41 Rem Mag, 375 H&H). I use Remington in .260 Rem and Lapua in 6.5x55. I wish Lapua made all of the above, I would use it exclusively, it's good stuff.

I've used it all, and I have to agree with the Nosler comments. It is damn good stuff. I like the Lapua and Norma too, the Norma is a bit soft, the Lapua is here and there on softness/hardness, but is probably my 2nd favorite now, behind the Nosler.....

Well I have some Nosler in 280 I have yet to try. I like RWS, Lapua & Norma, then WW for all rifle stuff. Pistol brass, WW first then RP.

I must say that after using WW and Rem for 30 years, I was very impressed with some Lapua I aquired recently for my 9.3x62.

have not yet tried Nosler, but have heard good things from friends.

Trez Hensley ----- I shoot all brass and have for years, to the tune of 3000 plus rounds per year. If I have my druthers I would shoot Lapua then Norma then Winchester then anything else. I have also shot thousands of rounds of Remington brass with no problems, but you asked what I liked best and there you have it. The Nosler may be very good but as of yet I have not shot that first round. Good shooting.

I don't know what the best is or what qualifies as the best.
I shoot Rem brass and won a match with it yesterday so I guess that is good enough for me.

If I have the extra $.... Lapua, Norma or Nosler. For my 'daily drivers' I have found that Winchester brass outlasts Remington and is cheaper most of the time.

Norma.

I like Lapua brass the best. Then I would go with Norma. Nosler seems like good stuff but I haven't got to use much of it. I'm trying Jamison in my Lott but haven't pulled the trigger yet so can't tell how it will last. Otherwise I use what I can get at the local gun shop.

All my rifles are hunting rifles and for the life of me can't even come close to justifying the cost of anything but WW, I have tried Lapua and Norma and my groups have not been effected one bit by paying $$$ for them the Winchester shoots just as well for a lot less so WW gets the nod 75% of the time.

I resize 308 LC match and WW 243 nickle for my 260 and 7mm-08 along with Federal preimum.

I see where Nosler is back in stock with the 300 H&H brass for the paltry sum of $1.40/ea. When it went in hiding back in the early fall of 2006 it was much less, go figure!

For my bigger game rifle, Winchester only.

My two .223's, one used Win brass, one Rem. Since they like different loads, I uses brass with different head stamps. The Rem brass doesn't last quite as long though.

For my .45 ACP, what ever is cheapest.

I use Remington for the scientific reason of that is what the little reloading shop carried when I started reloading. It has stood me in good stead for a long time. I'm sure there are fellows that feel the same way about WIN/FED also.
If you're talking about hunting loads for NA, the only thing that would justify Lapua and Norma is an oversized ego!
If you're doing some serious target competition, then Lapua is the brass to go to. My success with Norma has been spotty. Also, for what it cost to buy 100 Norma cases, you can buy 400 other kind. That allows you to do a lot of culling if you need to. Quite a price to pay for a "drilled" flashhole.
The fact is domestic brass can be brought up to Lapua specs but its gonna take some sweat equity to do it.