Moore77 wrote:Thanks guys for the information. Diameter for this bullet is .451. When I set up a crimp die I usually use a factory load and set the for to it. However the factory bullet is .452 so my neck tension was nill. Second when I got home I found two issues. 1 being I found that two scope screws had come loose and 2 my digital scale was varying 2 to 3 tenths from my mechanic scale. I'm waiting on a shipment of bullets now. Would any of you have a idea of fps using the 275 grain bullet ? This areas I hunt limit shots to 100 yards mostly 50 - 75. Thanks for the comments . It was costly but I learned a lot.
Is the diameter exactly .4510? Did you mic it?
What I'm trying to get at is I have a feeling the diameter is smaller than .451, which would affect accuracy. The 275 TSX is actually around .4505", but has a longer bearing surface, so accuracy isn't too bad. Barnes told me it was to reduce pressure, but maintain accuracy. Well the 200 XPB, which is a little larger in diameter, but shorter bearing surface, gives me better accuracy then the 275 TSX in a couple different barrels.
Kind of like how most people reloading FMJ bullets in the 450B usually don't get great accuracy. They usually run .4500-.4510 diameter and have a short bearing surface. I have tried the Nosler FMJ flat point (.4510 diameter, but longer bearing surface) and Sierra FMJ (.4515 diameter), and had better luck.