I recently tried roll crimping for my .300 win mag and was surprised to find it cut my groups in half!! The gun went from shooting 1.5 moa to 0.5 to .75 moa. Not bad for a sub 7 lb hunting rifle! The one problem is that I obviously have to trim all cases to exactly the same length to roll crimp.
Just curious if there is any range in case length with crimping that produces a minimal effect on accuracy.
Also, I thought about taper crimping instead. Is it correct to say that with a taper crimp, a variation in case length of .005 or so is not as critical?
Basically, I’m thinking about picking up a taper crimp die, but am wondering if I would be any better off that I am with the roll crimp. I am aware that I don’t need the crimp groove with the taper crimp
Just curious if there is any range in case length with crimping that produces a minimal effect on accuracy.
Also, I thought about taper crimping instead. Is it correct to say that with a taper crimp, a variation in case length of .005 or so is not as critical?
Basically, I’m thinking about picking up a taper crimp die, but am wondering if I would be any better off that I am with the roll crimp. I am aware that I don’t need the crimp groove with the taper crimp