I just found out something interesting relating to your question.
Just bought a new SW 632 in 327 Federal Magnum. In searching for load data and general information I found that Speer uses a
Small Rifle Primer in their factory ammo with the 115 gr Gold Dot HP.
Special Note Regarding Primers: Due to the high operating pressures, factory ammo for the 327 Federal uses
small rifle primers to prevent primer flowback. These handloads were developed with Federal #205 small rifle
primers. However, small rifle magnum primers are neither required nor recommended.
http://www.speer-bullets.com/pdf/327...8_DataFile.pdf