Update, for what it's worth. Based on some of the replies in this thread I loaded up some more rounds and tested them today in a Glock 43 with a 3.41 inch barrel (the Alliant data says that they used a 4 inch barrel. 5 shots each. First I duplicated the round that I started with, second I used that same data and increased the OCL to 1.150 as 1.130 was my mistake in the first test, and third I used the Sierra load data.
Lee/Alliant Data 6.6g of Power Pistol, 125g Sierra JHP #8125, OCL 1.130 = 1249.4fps
Lee/Alliant Data 6.6g of Power Pistol, 125g Sierra JHP #8125, OCL 1.150 = 1240.7fps
Sierra Data 5.8g of Power Pistol, 125g Sierra JHP #8125, OCL 1.100 = 1153.9fps
The results make sense to me, after cleaning the barrel all of the spent casings freely fit in the chamber, no resistance at all. Another interesting note is that I used the Lee data to start with but the Alliant data is the same, I think I read somewhere that Lee uses other manufacturers data.
Lee/Alliant Data 6.6g of Power Pistol, 125g Sierra JHP #8125, OCL 1.130 = 1249.4fps
Lee/Alliant Data 6.6g of Power Pistol, 125g Sierra JHP #8125, OCL 1.150 = 1240.7fps
Sierra Data 5.8g of Power Pistol, 125g Sierra JHP #8125, OCL 1.100 = 1153.9fps
The results make sense to me, after cleaning the barrel all of the spent casings freely fit in the chamber, no resistance at all. Another interesting note is that I used the Lee data to start with but the Alliant data is the same, I think I read somewhere that Lee uses other manufacturers data.
