First off,I honestly can't understand why folks have so much trouble with cooper's ale yeast? It's quite forgiving temp wise,has a range of 62-72F,& loves being re0hydrated. I've even made starters with it with no ill effects. But I'm finding now that re-hydrating it in 2C of boiled & cooled water with 1tsp dextrose works the best. The dextrose really gets them going like mad in about 15-20 minutes.
We put it up (re-hydtrated) against the US-05 sprinkled on dry. The US-05 being like 11.5g against the cooper's 7g. Both seemed to work at the same rate for about the same length of time. But the cooper's made a frutiy ester,where the US-05 was clean. Same temps,as they were right next to one another on our fermenter stand.
Now,having said that & eeading/looking around,I wound up at Midwest. They have the cooper's ale yeast in 15g packets. Labeled cooper's & everything. But makebeer.net doesn't carry them,& cooper's doesn't advertise it here that I've ever been aware of. So when I jget to brewing vwesion 2 of my Buckeye Burton ale,I'll use 2-15g packets instead of 4-7g packets. I also figure that maybe the 15g cooper's ale yeast packets from Midwest may well be fresher. Just wish I'd not forgotten them when I ordered stuff from them on 12/1. Oh well,need the rest of the ingredients anyway.
We've used cooper's ale yeast in all but one brew,& it works very well when re-hydrated. If you have temp control,try it at 65F. it should be way cleaner,much like the US-05. They do seem quite similar,save for the cooper's ester profile. But I'll tell you,that fruity ester was really good in my IPA,as it gave the citrus flavors from the hops used a bit more depth. Blended quite well in that case. So the cooper's fruity esters can be used to advantage. Just brew it closer to 62F for a cleaner 05 like character.
I almost chose the White Labs Burton ale yeast for my #3 Burton replica,but Midwest says it produces cider flavors,amonh others. I could def see where judges might missconstrue that part of the flavor profile.
So I went with the cooper's,& got a 1.065 wort down to 1.018,which is close to the Burton's profile for that bit of malty sweetness it was said to have. Kinda fun trying to bring back an ale that hasn't seen the light of day in some 121 years. That beer virtually died out as a style about 1890,when pale ale as we know it came around. So Cooper's ale yeast can do a good job as long as you re-hydrate it,ime. It def needs a blow off to start with in that case. I've also found that 66 to 68F is a good temp for the average brewer to get good results that doesn't have any dedicated temp control. PM me if you guys have further questions. I don't mind helping anyone seeking honest answers. No flamers,please.