Hi Peter,
I have not read the article... but, info I have gathered from others on judging pressure using a chrono goes as follows:
- velocity gains will fall off and may actually decrease when you have reached max pressure or gone (far) beyond it.
I have never really attempted to judge pressure in handguns (I'd hate to know what pressures my IPSC Super load pushed ;-). Normally I load my handguns within published data or just slightly beyond. I do use the pressure ring method in my bolt rifle loads. I feel fairly confident in my results using this method in addition to judging primers, ease of bolt opening...etc.
IMO judging chamber pressure w/o the correct equipment is a (semi-learned) guessing game. Learn about all the possible pressure signs, use a chrono and most importantly, use your head and best judgement.
ps- also, when testing max loads, do so at the hottest temperature you plan on shooting them.
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