After reading your comment I went back and rechecked the trigger on my Prodigy and I think you made a valid point on the use of a trigger gauge.That's what I figured. I think the numbers you are claiming for trigger pull weight are simply inaccurate. I can pull the trigger on my RIA 1911 (which is a 5# pull) quickly and also claim that it has a 2.5# trigger - if I want to claim a low number, rather than an accurate one.
I emailed Wheeler to ask about how to get correct measurements and whether the speed of the pull should be affecting the measurement. This is their response:
"With the designed measurements of the unit processing by 2 units it will require a slow trigger pull during use and may not be accurate with a quick trigger pull."
When I use my gauge, I pull the trigger as slowly as I can. That gives me the most consistent results, and, based on what Wheeler's said, the most accurate.
I could be wrong about the pull on your trigger, but I will say I am HIGHLY skeptical that a stock, factory Prodigy trigger (even after 2000 rounds) is really 2.5# on the pull (or was 3#, right out of the box).
With my Lyman digital gauge, if I pull back as slowly as possible I get different results depending on how fast or slow my pull is. When I initially checked my Prodigy I was getting 6+ lb pulling slowly. When I checked it recently I think I must have been a bit hasty and pulled it a bit faster resulting in better than actual results.
I went back this last time and using a very slow pull I came up with a new set of readings that are a bit higher. My newest results show a trigger weight more in the 5 lb range or maybe a bit less which is definitely an improvement over original but not as much as I thought.
So I' m not talking about anyone else, but in my case at least, I can see how different results can be obtained unless pull rates are very consistent. I would not have thought that pull speed was so critical. Just goes to show that we can always learn new things.