_rab_
08-12-11, 17:30
I was cleaning my rifle the other day, and noticed a light 'primer dimple' firing pin strike on my 5.56 Tap T2. I am familiar with the situation Doc describes in his 5.56 Duty Loads thread, that this issue can cause failure of the primer to ignite.
When the same cartridge is repeatedly chambered in the AR15, the floating firing pin lightly taps the primer; with repeated taps, the primer compound gets crushed, resulting in inadequate ignition characteristics--despite what appears to be a normal firing pin impression. Once a round has been chambered, DO NOT RE-CHAMBER IT for duty use. Do NOT re-chamber it again, except for training. This is CRITICAL!!! - Doc
Obviously that would be unacceptable.
Currently, I leave my AR loaded, chambered, saftey on. However, this is causing 'primer dimples'. What is the proper solution? Mag inserted, bolt locked back? Or is the best solution to have the mag inserted, but bolt forward?
A contributing factor in this decision process is the lack of factually based knowledge regarding the degradation of springs. I've read some about it, but am feeling like it is all theoretical. If I leave my bolt locked back, will that wear my buffer spring?
Rab
When the same cartridge is repeatedly chambered in the AR15, the floating firing pin lightly taps the primer; with repeated taps, the primer compound gets crushed, resulting in inadequate ignition characteristics--despite what appears to be a normal firing pin impression. Once a round has been chambered, DO NOT RE-CHAMBER IT for duty use. Do NOT re-chamber it again, except for training. This is CRITICAL!!! - Doc
Obviously that would be unacceptable.
Currently, I leave my AR loaded, chambered, saftey on. However, this is causing 'primer dimples'. What is the proper solution? Mag inserted, bolt locked back? Or is the best solution to have the mag inserted, but bolt forward?
A contributing factor in this decision process is the lack of factually based knowledge regarding the degradation of springs. I've read some about it, but am feeling like it is all theoretical. If I leave my bolt locked back, will that wear my buffer spring?
Rab