Just got new keggles and dry ran it today. Strike water at 175 degrees into keggle without insulation or preheated and went to 154 immediately but held very nice for about 90 minutes. Can anyone give me a rough idea of what sort of drop will happen with grain for 5 gallon batches -- are we talking double digits etc. - trying to not have to crank up strike higher for time and propane etc. thanks doc