I was going off what members on here said. They have the brass insert GT's that weigh with point at 430 grains. Was what I was also told by Dan Miller when I bought them. But mine when I first got the scale they weight in 30 grains less. Now yours are 8 grains heavier, but you have the 4" vanes, makes sense to me, but neither of us have the 430 grain arrows that people said we have. What weight where you told your GT weighed when you bought them? Again, don't none of you take this as a grip about GT arrows, I like them, I like shooting them as much as I like knowing what I am using also!! LOL!!

I got mine from Dan also so were in the same boat...I will more then likely strip one down and weigh it that way there is no confusion to its exact weight....but I want to wait till I get a digital scale to do this little test.....

alum nocks 22 gr
alum inserts 32 gr
brass inserts 110 gr [or possibly 90]
[3] 2"Blazers 18 gr
[3] 4" dura 27 gr
GT L II's 8.6 gr per inch [been told, haven't checked]

Factory GT's used to weigh 357 gr w/ alum inserts and 5" vanes. If your MK's are light, call him and ask why, I'm sure he'ld like to know.