Some rifles may have issues of interference between the aluminum bolt shroud and the firing pin. Rifles with polymer bolt shrouds are not affected.
In rare instances, the interference can disrupt the firing mechanism and cause it to not function properly. This can lead to light primer strikes or even cause the rifle to fail to fire when the trigger is pulled. In the latter case, the rifle may then fire when the bolt handle is lifted.
Remember, whenever a firearm fails to fire, continue to treat it as if it could fire at any time until the problem is resolved. Keep the rifle pointed in a safe direction and wait 30 seconds before attempting to slowly lift the bolt handle.
In affected rifles, the problem typically resolves itself as wear occurs and interference is mitigated.
Only a small portion of Ruger Precision Rifles are affected and there are no known reports of injuries, but Ruger is apparently trying to get ahead of any problems that do occur.
You can check to see if your Ruger Precision Rifle may be affected by the issue by checking the serial number on the rifle’s upper receiver.
Rifles with serial numbers from 1800-26274 to 1800-78345 or from 1801-00506 to 1801-30461 may have the problem. Rifles with serial numbers starting in 1802, 1803, or higher were manufactured using a different design and are not affected.
Newly designed bolt shrouds can be identified by the presence of a round dimple on the angled surface directly behind the firing pin back. If your bolt shroud has this dimple, then it is of the new design and you need to take no further action.
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However, not all newly designed bolt shrouds have this dimple, so a lack of a dimple does not mean that your rifle is unsafe.
If your Ruger Precision Rifle’s serial number falls within in the range of possibly affected rifles, or if your rifle does not have a dimple on the bolt shroud, all you need to do is go to the Ruger Precision Rifle Safety Bulletin website and look up your Precision Rifle’s serial number to see if it could be affected.
Most rifles, even within the above serial number range, will never experience an issue. If you’ve fired 100 or more rounds through your Ruger Precision Rifle with no problems, it is unlikely that you’ll experience the interference and therefore need not take action.
However, if your Ruger Precision Rifle falls within the above serial number range and you have experienced issues, or if your Ruger Precision Rifle falls within the above serial number range and you are unsure if there is a problem, you should go ahead and take action.
source: https://www.pewpewtactical.com/