Quick Answer
Common reloading mistakes specific to 7mm SAUM include over- or under-charging the case, incorrect primer seating depth, and improper case headspace.
Incorrect Case Headspace
When reloading the 7mm SAUM, it’s essential to maintain the correct case headspace. This is typically between 0.001 and 0.003 inches. Any deviation from this range can lead to premature firing pin engagement, potentially causing case head separations or firing pin strikes on the case rim, rather than the primer. Use a case gauge to ensure accuracy.
Over-Charging the Case
When reloading the 7mm SAUM, over-charging the case can be detrimental. The recommended maximum powder charge for the 7mm SAUM is around 65-70 grains of a fast-burning powder, such as H1000 or Varget. Over-charging can lead to excessive pressure, potential case rupture, or even catastrophic barrel failure. Always refer to the manufacturer’s recommended load data and use a reliable powder scale.
Primer Seating Depth
Incorrect primer seating depth can also be a common mistake when reloading the 7mm SAUM. The ideal primer seating depth for the 7mm SAUM is between 0.020 and 0.030 inches from the case head. This will ensure proper primer engagement and prevent primer strikes on the case rim. Using a primer seating die will help achieve the correct depth consistently.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.