Additional ServicesAll relevant info is in the readme. I do not take responsibility for any injury orillegal activities perpetrated with these files. Print at your own risk.Precision Barrels only uses SAAMI spec chamber reamers in our chambering services. If you are using longer bullets and need your throat/freebore extended we require 3-4 full length sized dummy rounds (no powder, no primer) sent to us for this purpose. Remember that your dummy rounds need to made from full length sized brass (no as fired or un-sized dummies). If you require a throat that is shorter than what is typical on a SAAMI spec reamer, you will need to provide the reamer.