You could measure the case with a caliper to determine if it is too long. Compare to SAAMI values.
If headspace issue, you could try to place an empty 357 mag case over the bullet and measure from base to base.
Subtract length of 357 mag case to find headspace length. Compare to other cases which do chamber.
In your picture, there is also a HUGE dent in the case shoulder that may be the problem.
If headspace issue, you could try to place an empty 357 mag case over the bullet and measure from base to base.
Subtract length of 357 mag case to find headspace length. Compare to other cases which do chamber.
In your picture, there is also a HUGE dent in the case shoulder that may be the problem.