crimp

[lisa1lacy2]

can you put to much of a CRIMP on a case .
and does it affect accuracy.
the reason I ask is that I loaded some 250GR hard cast yesterday with 8.5gr of titegroup starline cases fed 150 primers .
this load always shot good but for some reason this did not.
and is there any way to now that you are putting the same amount of crimp other than feel? :oops:

[Savage]

I like to crimp as a seperate operation from bullet seating. That way the crimp is consistant. I highly reccomend the "Lee Factory Crimp" die for this operation. If you have a good caliper, you can measure the crimp at the case mouth. The crimp can indeed have an effect on accuracy. Some powders require more crimp than others, depending on burn rate of the powder. Revolvers  require a firm roll crimp, to prevent the bullet from moving forward on recoil and binding up the cylinder. (Under heavy recoil)
Savage