As for the 25-20 and 32-20 is there much if any difference between Remington and Winchester brass?
Neither are readily available, but if they were both equally available which would you choose?

I only shoot the 25-20 WCF so have no idea about brass for the 32-20 WCF but suspect the same would hold true for it.

The Winchester brass will usually fail somewhere between 10 and 20 firings. The R-P brass has always gone at least 200 firings for me, and usually much farther. Most of the cases I've been able to get well beyond 500 firings before retiring them out of fear. The last thing I want is a separated case during a match. I keep some partially separated cases in my shooting box to remind myself to keep an eye on my brass while shooting.

I need to point out that this is with a 120 gr. bullet running at ~1660 fps. It's a stout load to say the least. I suspect, but can't say for sure, that the WW brass may be OK for lighter bullets at lower velocities. I wouldn't count on it though. My advise would be to wait for R-P brass and not have to worry about separated cases after so few shots. 

My experiences and opinion only. YMMV.

JerryH
AKA Jerry_H

I can mirror Jerry results for 32/20 (.308 groove) and a 180 gr BSed bullet @ 1408 fps.

As little as 5 - 10 firing with Win brass, before partial seperation.

I have my wife rotating 5 cases of Rem brass now and we have a few hundred rounds w/o any sign of seperation.

I think Win brass will do fine with standard low pressure loads though.

Frank

I have used Winchester brass with good success in fixed ammo in many calibers for many years , for all Win 73 ,92 and 94 Cals, and I dont anneal, but do size the brass as little as possible, backing off FLS die as much as possible to fit chamber nicely. I also have had good results with Rem , and lately Starline seems probably better than either one. I like that it is thinner brass for my 38-55 , and dont have to ream or neck turn. I think in 45-70 it is the thinnest also and give me more versatility in larger bullet dia selection . Starline 45-90 brass has worked well to form 40-82 , still have to turn necks which is tedious, but brass seems right hardness and quite good quality looking at the turning swarf
Phil

Are the guys reporting shorter Winchester case life breach seating or shooting fixed?  I've been shooting BS with Starline for 14 cycles in my 32-20 and have had no failures.  I have a batch of Remington cases but haven't used them yet.  The difference I note is that the Starline is about 25-30 thousands shorter than the Remington.

JS

Whoops! I meant to say I've neck sized 14 times with no failures!

Please don't get the idea that Jerry or I are putting down Win brass and it's only the 25/20 and 32/20 brass that we are taking about, no others., It's just that the Win brass at higher pressures, isn't as strong. It will stretch at either the web at the case head or in the shoulder, either in front or back of it (32/20). I had partial seperation at the web and just back of the shoulder but, I had a full seperation of the neck at the shoulder neck juction. That's no fun, at all. With the thin brass, it's hard to get it out. I've had no more problems since my wife started using only Rem cases.

Remember that both Jerry and I are shooting high pressure loads, I think my pressure is in the 30K>. 

I just weighed both a Rem and a Win case (both 25/20's) and the Rem was only 1 gr heavier so, there is more to it than just a heavier case. Maybe a little different alloy or at least harder brass.

I know one other guy with the same caliber as mine that has have this problem and I believe it rares it head with the .321 32/20, also.
Frank

I bought some newW-W 25-20 brass last year and it was obvious upon seating the bullets that all was not well and that the necks were brittle and/or hadn't been annealed at the the factory.    I went ahead and commenced to having a 1/3 of them with split necks from a moderate load.  I should have annealed the necks right off.